Related literature {#sec1}
==================

For organoaluminum complexes, see: Atwood & Harvey (2001[@bb3]); Dechy-Cabaret *et al.* (2004[@bb6]); Izod (2002[@bb7]); Linton *et al.* (2001[@bb8]); Liu *et al.* (2000[@bb9]); Ma *et al.* (2005[@bb10]); Nomura *et al.* (2005[@bb11]). For the synthesis of the ligand, see: Al-Masri *et al.* (2004*a* [@bb1]). For a discussion of chirality in the ligand, see: Al-Masri *et al.* (2004*b* [@bb2]).

Experimental {#sec2}
============

 {#sec2.1}

### Crystal data {#sec2.1.1}

\[Al~2~(CH~3~)~5~(C~15~H~15~FNO)\]*M* *~r~* = 373.41Orthorhombic,*a* = 9.1089 (7) Å*b* = 13.1601 (10) Å*c* = 18.3443 (15) Å*V* = 2199.0 (3) Å^3^*Z* = 4Mo *K*α radiationμ = 0.15 mm^−1^*T* = 295 K0.21 × 0.13 × 0.11 mm

### Data collection {#sec2.1.2}

Bruker SMART CCD area-detector diffractometerAbsorption correction: multi-scan (*SADABS*; Bruker, 2001[@bb5]) *T* ~min~ = 0.970, *T* ~max~ = 0.98412338 measured reflections4318 independent reflections3641 reflections with *I* \> 2σ(*I*)*R* ~int~ = 0.039

### Refinement {#sec2.1.3}

*R*\[*F* ^2^ \> 2σ(*F* ^2^)\] = 0.055*wR*(*F* ^2^) = 0.130*S* = 1.094318 reflections233 parametersH-atom parameters constrainedΔρ~max~ = 0.65 e Å^−3^Δρ~min~ = −0.17 e Å^−3^

 {#d5e377}

Data collection: *SMART* (Bruker, 1998[@bb4]); cell refinement: *SAINT* (Bruker, 1998[@bb4]); data reduction: *SAINT*; program(s) used to solve structure: *SHELXS97* (Sheldrick, 2008[@bb12]); program(s) used to refine structure: *SHELXL97* (Sheldrick, 2008[@bb12]); molecular graphics: *SHELXTL* (Sheldrick, 2008[@bb12]); software used to prepare material for publication: *SHELXTL*.

Supplementary Material
======================

Crystal structure: contains datablocks global, I. DOI: [10.1107/S1600536809012252/tk2388sup1.cif](http://dx.doi.org/10.1107/S1600536809012252/tk2388sup1.cif)

Structure factors: contains datablocks I. DOI: [10.1107/S1600536809012252/tk2388Isup2.hkl](http://dx.doi.org/10.1107/S1600536809012252/tk2388Isup2.hkl)

Additional supplementary materials: [crystallographic information](http://scripts.iucr.org/cgi-bin/sendsupfiles?tk2388&file=tk2388sup0.html&mime=text/html); [3D view](http://scripts.iucr.org/cgi-bin/sendcif?tk2388sup1&Qmime=cif); [checkCIF report](http://scripts.iucr.org/cgi-bin/paper?tk2388&checkcif=yes)

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: [TK2388](http://scripts.iucr.org/cgi-bin/sendsup?tk2388)).

We thank the National Natural Science Foundation of China (grant Nos. 20772044 and 20674024).

Comment
=======

Organoaluminum complexes have attracted considerable attention due to their rich structural chemistry (Izod, 2002), applications in organic synthesis (Linton *et al.*, 2001) and in catalytic chemistry (Dechy-Cabaret *et al.*, 2004; Liu *et al.*, 2000). A large number of ligands have been used to stabilize organoaluminum complexes and to tune the properties of their complexes. Among them, salen (Atwood & Harvey, 2001), salicylaldimine (Nomura *et al.*, 2005) and 1,4-dithiabutanediylbis(6-tert-butyl-4-methylphenol) ligands (Ma *et al.*, 2005) have attracted considerable attention. The aminophenylalcohol ligand, with a similar framework to the salicylaldimine ligand has been less well investigated. Herein, the structure of the title aluminium complex, (I), with the aminophenylalcohol ligand, is reported.

In the molecule of (I), Fig. 1, the Al atoms exist in different coordination environments, but with both adopting distorted tetrahedral geometries. The tetrahedral coordination around the Al1 atom involves three methyl-C atoms and the O1 atom from the deprotonated aminophenylalcohol ligand. The tetrahedral coordination around the Al2 atom involves the N1 atom and the O1 atom from the ligand and two methyl-C atoms. The (2-dimethylamino-phenyl)(2-fluoro-phenyl)methanolate ligand is therefore tridentate, bridging the two Al atoms via the O1 atom. The Al---Al separation within the dimer is 3.2631 (12) Å. The Al2---O distance (1.8165 (19) Å) is significantly shorter than the Al1---O distance (1.9199 (19) Å) because the former bond has more covalent chartacter. The six-membered chelate ring, O1/Al2/N1/C1/C6/C7, has a boat conformation with the C7 and N1 atoms occupying the apex positions. The dihedral angle between the two phenyl rings is 79.3°. Compound (I) was refined as a racemic twin.

Experimental {#experimental}
============

The precursor compound (2-dimethylamino-phenyl)-(2-fluoro-phenyl)methanol was synthesized according to a modified literature procedure (Al-Masri *et al.*, 2004a). After removal of the solvent of a solution of nBuLi (79 ml, 79 mmol), *N*,*N*-dimethylaniline (10.0 ml, 79 mmol) was added at 0 °C with stirring, and the solution was slowly heated to 80 °C for 24 h, during which a yellow solid was formed. 2-FC~6~H~4~CHO (10.0 g, 79 mmol) in 40 ml of Et~2~O was added to the mixture at 0 °C. After stirring for 12 h, the reaction was quenched with H~2~O (30 ml), and the organic phase was separated, washed with brine, and dried over magnesium sulfate. The solvent was removed *in vacuo* to give the crude product as a yellow solid. The pure product was obtained by recrystallization from methanol as a white solid (13.9 g, 82%). The absolute configuration of the ligand could not be determined (Al-Masri *et al.*, 2004b). AlMe~3~ (4.0 ml, 1.0 *M* in toluene, 4.0 mmol) was added to a solution of (2-dimethylamino-phenyl)-(2-fluoro-phenyl)-methanol (0.49 g, 2.0 mmol) in toluene (20 ml) at -10 °C with stirring. The solution was gently heated to 60 °C for 24 h. After removal of the solvent, the product was crystallized from hexane and the desired complex (I) as a yellow crystalline solid (0.64 g, 87%) was obtained.

Refinement {#refinement}
==========

The C-bound H atoms were positioned geometrically with C---H = 0.93 (aromatic), 0.98 (methine) and 0.96 (methyl) Å, and allowed to ride on their parent atoms in the riding model approximation with *U*~iso~(H) = 1.2 (1.5 for methyl) *U*~eq~(C). The crystal studied was a racemic twin with a 0.4 (2):0.6 (2) domain ratio.

Figures
=======

![View of the molecule of (I) showing the atom labelling scheme. Displacement ellipsoids are drawn at the 30% probability level and H atoms have been omitted for reasons of clarity.](e-65-0m577-fig1){#Fap1}

![The formation of the title compound.](e-65-0m577-fig2){#Fap2}

Crystal data {#tablewrapcrystaldatalong}
============

  ------------------------------------ ---------------------------------------
  \[Al~2~(CH~3~)~5~(C~15~H~15~FNO)\]   *D*~x~ = 1.128 Mg m^−3^
  *M~r~* = 373.41                      Melting point: not measured K
  Orthorhombic, *P*2~1~2~1~2~1~        Mo *K*α radiation, λ = 0.71073 Å
  Hall symbol: P 2ac 2ab               Cell parameters from 4318 reflections
  *a* = 9.1089 (7) Å                   θ = 1.9--26.4°
  *b* = 13.1601 (10) Å                 µ = 0.15 mm^−1^
  *c* = 18.3443 (15) Å                 *T* = 295 K
  *V* = 2199.0 (3) Å^3^                Block, yellow
  *Z* = 4                              0.21 × 0.13 × 0.11 mm
  *F*(000) = 800                       
  ------------------------------------ ---------------------------------------

Data collection {#tablewrapdatacollectionlong}
===============

  ------------------------------------------------------------ --------------------------------------
  Bruker SMART CCD area-detector diffractometer                4318 independent reflections
  Radiation source: fine-focus sealed tube                     3641 reflections with *I* \> 2σ(*I*)
  graphite                                                     *R*~int~ = 0.039
  Detector resolution: 9.00 cm pixels mm^-1^                   θ~max~ = 26.0°, θ~min~ = 1.9°
  φ and ω scans                                                *h* = −9→11
  Absorption correction: multi-scan (*SADABS*; Bruker, 2001)   *k* = −16→13
  *T*~min~ = 0.970, *T*~max~ = 0.984                           *l* = −22→22
  12338 measured reflections                                   
  ------------------------------------------------------------ --------------------------------------

Refinement {#tablewraprefinementdatalong}
==========

  ------------------------------------- -------------------------------------------------------------------------------------
  Refinement on *F*^2^                  Primary atom site location: structure-invariant direct methods
  Least-squares matrix: full            Secondary atom site location: difference Fourier map
  *R*\[*F*^2^ \> 2σ(*F*^2^)\] = 0.055   Hydrogen site location: inferred from neighbouring sites
  *wR*(*F*^2^) = 0.130                  H-atom parameters constrained
  *S* = 1.09                            *w* = 1/\[σ^2^(*F*~o~^2^) + (0.0726*P*)^2^\] where *P* = (*F*~o~^2^ + 2*F*~c~^2^)/3
  4318 reflections                      (Δ/σ)~max~ \< 0.001
  233 parameters                        Δρ~max~ = 0.65 e Å^−3^
  0 restraints                          Δρ~min~ = −0.17 e Å^−3^
  ------------------------------------- -------------------------------------------------------------------------------------

Special details {#specialdetails}
===============

  ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.
  Refinement. Refinement of F^2^ against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F^2^, conventional R-factors R are based on F, with F set to zero for negative F^2^. The threshold expression of F^2^ \> 2sigma(F^2^) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F^2^ are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.
  ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å^2^) {#tablewrapcoords}
==================================================================================================

  ------ -------------- -------------- --------------- -------------------- --
         *x*            *y*            *z*             *U*~iso~\*/*U*~eq~   
  Al1    1.10860 (9)    0.46062 (7)    0.20698 (4)     0.0355 (2)           
  Al2    0.88654 (11)   0.37629 (6)    0.08119 (5)     0.0394 (2)           
  C1     0.7128 (3)     0.5518 (2)     0.04877 (15)    0.0376 (6)           
  C2     0.6729 (4)     0.6132 (3)     −0.00967 (18)   0.0564 (9)           
  H2     0.6312         0.5839         −0.0509         0.068\*              
  C3     0.6939 (5)     0.7156 (3)     −0.00766 (19)   0.0622 (11)          
  H3     0.6659         0.7555         −0.0471         0.075\*              
  C4     0.7561 (5)     0.7600 (3)     0.05242 (19)    0.0570 (10)          
  H4     0.7724         0.8298         0.0535          0.068\*              
  C5     0.7942 (4)     0.7009 (2)     0.11100 (17)    0.0433 (7)           
  H5     0.8360         0.7315         0.1517          0.052\*              
  C6     0.7722 (3)     0.5967 (2)     0.11129 (15)    0.0349 (6)           
  C7     0.8237 (3)     0.5385 (2)     0.17944 (14)    0.0312 (6)           
  H7     0.8830         0.5865         0.2077          0.037\*              
  C8     0.7058 (3)     0.4993 (2)     0.23137 (14)    0.0326 (6)           
  C9     0.5929 (3)     0.5616 (2)     0.25606 (15)    0.0376 (7)           
  C10    0.4867 (3)     0.5293 (3)     0.30503 (17)    0.0490 (8)           
  H10    0.4127         0.5732         0.3200          0.059\*              
  C11    0.4926 (4)     0.4320 (3)     0.33089 (18)    0.0519 (9)           
  H11    0.4211         0.4092         0.3631          0.062\*              
  C12    0.6030 (4)     0.3679 (3)     0.30967 (17)    0.0492 (8)           
  H12    0.6075         0.3022         0.3281          0.059\*              
  C13    0.7082 (3)     0.4015 (2)     0.26058 (16)    0.0391 (7)           
  H13    0.7827         0.3573         0.2467          0.047\*              
  C14    0.5573 (4)     0.4087 (3)     0.0817 (2)      0.0515 (8)           
  H14A   0.5575         0.4322         0.1312          0.077\*              
  H14B   0.5498         0.3359         0.0810          0.077\*              
  H14C   0.4752         0.4376         0.0563          0.077\*              
  C15    0.6867 (5)     0.4024 (3)     −0.03245 (18)   0.0603 (10)          
  H15A   0.5921         0.4194         −0.0520         0.090\*              
  H15B   0.6991         0.3299         −0.0330         0.090\*              
  H15C   0.7620         0.4334         −0.0615         0.090\*              
  C16    1.0316 (4)     0.4098 (3)     0.00634 (19)    0.0651 (11)          
  H16A   1.0177         0.4788         −0.0093         0.098\*              
  H16B   1.0197         0.3650         −0.0345         0.098\*              
  H16C   1.1286         0.4021         0.0261          0.098\*              
  C17    0.8374 (5)     0.2368 (2)     0.1079 (2)      0.0615 (10)          
  H17A   0.9130         0.2096         0.1387          0.092\*              
  H17B   0.8296         0.1962         0.0646          0.092\*              
  H17C   0.7455         0.2360         0.1334          0.092\*              
  C18    1.1997 (4)     0.3299 (3)     0.17878 (19)    0.0558 (9)           
  H18A   1.1376         0.2749         0.1938          0.084\*              
  H18B   1.2937         0.3236         0.2020          0.084\*              
  H18C   1.2121         0.3279         0.1268          0.084\*              
  C19    1.0612 (3)     0.4677 (3)     0.31239 (15)    0.0426 (7)           
  H19A   0.9969         0.5243         0.3212          0.064\*              
  H19B   1.1500         0.4764         0.3398          0.064\*              
  H19C   1.0136         0.4060         0.3272          0.064\*              
  C20    1.1980 (4)     0.5841 (3)     0.1655 (2)      0.0576 (10)          
  H20A   1.1874         0.5833         0.1134          0.086\*              
  H20B   1.3004         0.5862         0.1779          0.086\*              
  H20C   1.1498         0.6430         0.1850          0.086\*              
  F1     0.5848 (2)     0.65789 (13)   0.23063 (10)    0.0526 (5)           
  N1     0.6977 (3)     0.4407 (2)     0.04485 (13)    0.0419 (6)           
  O1     0.92059 (19)   0.45697 (14)   0.15974 (9)     0.0319 (4)           
  ------ -------------- -------------- --------------- -------------------- --

Atomic displacement parameters (Å^2^) {#tablewrapadps}
=====================================

  ----- ------------- ------------- ------------- -------------- -------------- --------------
        *U*^11^       *U*^22^       *U*^33^       *U*^12^        *U*^13^        *U*^23^
  Al1   0.0302 (4)    0.0426 (5)    0.0336 (4)    0.0007 (4)     −0.0021 (4)    0.0045 (3)
  Al2   0.0461 (5)    0.0358 (5)    0.0363 (4)    0.0089 (4)     −0.0048 (4)    −0.0070 (3)
  C1    0.0364 (15)   0.0405 (17)   0.0358 (14)   0.0091 (14)    −0.0039 (12)   0.0024 (12)
  C2    0.064 (2)     0.064 (2)     0.0409 (17)   0.013 (2)      −0.0107 (16)   0.0046 (15)
  C3    0.086 (3)     0.052 (2)     0.049 (2)     0.018 (2)      −0.004 (2)     0.0183 (17)
  C4    0.078 (3)     0.0336 (18)   0.059 (2)     0.0099 (18)    0.0115 (19)    0.0106 (15)
  C5    0.0482 (19)   0.0369 (17)   0.0449 (16)   0.0039 (15)    0.0052 (15)    0.0023 (13)
  C6    0.0342 (15)   0.0350 (16)   0.0355 (14)   0.0051 (13)    0.0041 (12)    0.0003 (12)
  C7    0.0328 (14)   0.0279 (13)   0.0331 (13)   0.0020 (12)    −0.0032 (11)   −0.0063 (11)
  C8    0.0262 (15)   0.0406 (15)   0.0311 (13)   0.0002 (12)    −0.0038 (11)   −0.0040 (11)
  C9    0.0395 (17)   0.0361 (16)   0.0371 (14)   0.0012 (14)    −0.0048 (14)   −0.0040 (12)
  C10   0.0313 (16)   0.067 (2)     0.0489 (18)   0.0017 (16)    0.0049 (14)    −0.0135 (17)
  C11   0.0396 (18)   0.069 (2)     0.0469 (18)   −0.0107 (17)   0.0071 (15)    0.0043 (17)
  C12   0.052 (2)     0.0467 (18)   0.0488 (18)   −0.0114 (17)   −0.0033 (16)   0.0061 (13)
  C13   0.0352 (16)   0.0389 (17)   0.0433 (16)   −0.0003 (13)   −0.0017 (13)   −0.0010 (13)
  C14   0.0427 (18)   0.051 (2)     0.061 (2)     −0.0049 (15)   −0.0136 (16)   −0.0063 (16)
  C15   0.071 (3)     0.066 (2)     0.0437 (18)   0.009 (2)      −0.0214 (18)   −0.0159 (16)
  C16   0.063 (2)     0.093 (3)     0.0397 (18)   0.023 (2)      0.0042 (17)    −0.0035 (19)
  C17   0.074 (3)     0.0376 (19)   0.073 (2)     0.0052 (17)    −0.020 (2)     −0.0111 (16)
  C18   0.049 (2)     0.068 (2)     0.0507 (19)   0.0196 (18)    −0.0025 (16)   0.0013 (17)
  C19   0.0427 (17)   0.0503 (19)   0.0349 (15)   0.0009 (15)    −0.0037 (12)   −0.0006 (13)
  C20   0.047 (2)     0.062 (2)     0.063 (2)     −0.0124 (18)   −0.0082 (17)   0.0220 (18)
  F1    0.0529 (12)   0.0404 (10)   0.0646 (11)   0.0095 (8)     0.0089 (10)    −0.0038 (8)
  N1    0.0441 (15)   0.0428 (15)   0.0387 (13)   0.0033 (12)    −0.0117 (12)   −0.0068 (11)
  O1    0.0298 (10)   0.0329 (10)   0.0331 (9)    0.0040 (8)     −0.0009 (7)    −0.0037 (7)
  ----- ------------- ------------- ------------- -------------- -------------- --------------

Geometric parameters (Å, °) {#tablewrapgeomlong}
===========================

  ----------------- ------------- ------------------- -------------
  Al1---O1          1.9200 (19)   C11---C12           1.369 (5)
  Al1---C20         1.971 (3)     C11---H11           0.9300
  Al1---C18         1.978 (3)     C12---C13           1.387 (4)
  Al1---C19         1.984 (3)     C12---H12           0.9300
  Al2---O1          1.8165 (19)   C13---H13           0.9300
  Al2---C17         1.952 (4)     C14---N1            1.506 (4)
  Al2---C16         1.956 (4)     C14---H14A          0.9600
  Al2---N1          2.030 (3)     C14---H14B          0.9600
  C1---C2           1.391 (4)     C14---H14C          0.9600
  C1---C6           1.399 (4)     C15---N1            1.508 (4)
  C1---N1           1.471 (4)     C15---H15A          0.9600
  C2---C3           1.361 (5)     C15---H15B          0.9600
  C2---H2           0.9300        C15---H15C          0.9600
  C3---C4           1.370 (5)     C16---H16A          0.9600
  C3---H3           0.9300        C16---H16B          0.9600
  C4---C5           1.372 (4)     C16---H16C          0.9600
  C4---H4           0.9300        C17---H17A          0.9600
  C5---C6           1.386 (4)     C17---H17B          0.9600
  C5---H5           0.9300        C17---H17C          0.9600
  C6---C7           1.540 (4)     C18---H18A          0.9600
  C7---O1           1.435 (3)     C18---H18B          0.9600
  C7---C8           1.525 (4)     C18---H18C          0.9600
  C7---H7           0.9800        C19---H19A          0.9600
  C8---C9           1.391 (4)     C19---H19B          0.9600
  C8---C13          1.395 (4)     C19---H19C          0.9600
  C9---F1           1.352 (3)     C20---H20A          0.9600
  C9---C10          1.387 (4)     C20---H20B          0.9600
  C10---C11         1.366 (5)     C20---H20C          0.9600
  C10---H10         0.9300                            
                                                      
  O1---Al1---C20    102.42 (12)   C8---C13---H13      118.9
  O1---Al1---C18    103.56 (13)   N1---C14---H14A     109.5
  C20---Al1---C18   116.26 (16)   N1---C14---H14B     109.5
  O1---Al1---C19    104.29 (11)   H14A---C14---H14B   109.5
  C20---Al1---C19   115.31 (16)   N1---C14---H14C     109.5
  C18---Al1---C19   112.79 (14)   H14A---C14---H14C   109.5
  O1---Al2---C17    112.96 (14)   H14B---C14---H14C   109.5
  O1---Al2---C16    108.04 (14)   N1---C15---H15A     109.5
  C17---Al2---C16   122.89 (17)   N1---C15---H15B     109.5
  O1---Al2---N1     99.28 (10)    H15A---C15---H15B   109.5
  C17---Al2---N1    106.28 (15)   N1---C15---H15C     109.5
  C16---Al2---N1    104.34 (14)   H15A---C15---H15C   109.5
  C2---C1---C6      119.1 (3)     H15B---C15---H15C   109.5
  C2---C1---N1      121.1 (3)     Al2---C16---H16A    109.5
  C6---C1---N1      119.8 (2)     Al2---C16---H16B    109.5
  C3---C2---C1      121.2 (3)     H16A---C16---H16B   109.5
  C3---C2---H2      119.4         Al2---C16---H16C    109.5
  C1---C2---H2      119.4         H16A---C16---H16C   109.5
  C2---C3---C4      120.2 (3)     H16B---C16---H16C   109.5
  C2---C3---H3      119.9         Al2---C17---H17A    109.5
  C4---C3---H3      119.9         Al2---C17---H17B    109.5
  C3---C4---C5      119.5 (3)     H17A---C17---H17B   109.5
  C3---C4---H4      120.2         Al2---C17---H17C    109.5
  C5---C4---H4      120.2         H17A---C17---H17C   109.5
  C4---C5---C6      121.9 (3)     H17B---C17---H17C   109.5
  C4---C5---H5      119.1         Al1---C18---H18A    109.5
  C6---C5---H5      119.1         Al1---C18---H18B    109.5
  C5---C6---C1      118.1 (3)     H18A---C18---H18B   109.5
  C5---C6---C7      116.8 (3)     Al1---C18---H18C    109.5
  C1---C6---C7      125.0 (2)     H18A---C18---H18C   109.5
  O1---C7---C8      109.7 (2)     H18B---C18---H18C   109.5
  O1---C7---C6      110.8 (2)     Al1---C19---H19A    109.5
  C8---C7---C6      117.5 (2)     Al1---C19---H19B    109.5
  O1---C7---H7      106.0         H19A---C19---H19B   109.5
  C8---C7---H7      106.0         Al1---C19---H19C    109.5
  C6---C7---H7      106.0         H19A---C19---H19C   109.5
  C9---C8---C13     115.5 (3)     H19B---C19---H19C   109.5
  C9---C8---C7      121.7 (2)     Al1---C20---H20A    109.5
  C13---C8---C7     122.7 (2)     Al1---C20---H20B    109.5
  F1---C9---C10     118.2 (3)     H20A---C20---H20B   109.5
  F1---C9---C8      118.7 (3)     Al1---C20---H20C    109.5
  C10---C9---C8     123.1 (3)     H20A---C20---H20C   109.5
  C11---C10---C9    119.0 (3)     H20B---C20---H20C   109.5
  C11---C10---H10   120.5         C1---N1---C14       109.6 (2)
  C9---C10---H10    120.5         C1---N1---C15       112.6 (2)
  C10---C11---C12   120.5 (3)     C14---N1---C15      105.8 (3)
  C10---C11---H11   119.8         C1---N1---Al2       108.64 (17)
  C12---C11---H11   119.8         C14---N1---Al2      117.10 (19)
  C11---C12---C13   119.7 (3)     C15---N1---Al2      103.0 (2)
  C11---C12---H12   120.1         C7---O1---Al2       122.10 (15)
  C13---C12---H12   120.1         C7---O1---Al1       114.61 (15)
  C12---C13---C8    122.2 (3)     Al2---O1---Al1      121.66 (10)
  C12---C13---H13   118.9                             
  ----------------- ------------- ------------------- -------------
