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

For the synthesis and structures of related tin and titanium complexes, see: Boyle *et al.* (2002[@bb1]); Eslava *et al.* (2010[@bb3]); Fric & Schubert (2008[@bb5]); Harrison *et al.* (1978[@bb6]); Mijatovic *et al.* (2001[@bb7]); Mokal *et al.* (1994[@bb8]); Vatsa *et al.* (1991[@bb12]); Verdenelli *et al.* (2000[@bb13]).

Experimental   {#sec2}
==============

 {#sec2.1}

### Crystal data   {#sec2.1.1}

\[Sn~4~(C~3~H~7~O)~4~Cl~4~O~2~\]*M* *~r~* = 884.98Monoclinic,*a* = 6.4423 (3) Å*b* = 17.8302 (7) Å*c* = 11.6843 (5) Åβ = 105.474 (2)°*V* = 1293.5 (1) Å^3^*Z* = 2Mo *K*α radiationμ = 4.25 mm^−1^*T* = 296 K0.36 × 0.17 × 0.12 mm

### Data collection   {#sec2.1.2}

Nonius KappaCCD diffractometerAbsorption correction: multi-scan (*DENZO*/*SCALEPACK*; Otwinowski & Minor, 1997[@bb10]) *T* ~min~ = 0.310, *T* ~max~ = 0.62914221 measured reflections3853 independent reflections2930 reflections with *I* \> 2σ(*I*)*R* ~int~ = 0.041

### Refinement   {#sec2.1.3}

*R*\[*F* ^2^ \> 2σ(*F* ^2^)\] = 0.038*wR*(*F* ^2^) = 0.061*S* = 1.103853 reflections118 parametersH-atom parameters constrainedΔρ~max~ = 0.93 e Å^−3^Δρ~min~ = −0.80 e Å^−3^

 {#d5e500}

Data collection: *COLLECT* (Nonius, 2000[@bb9]); cell refinement: *DENZO*/*SCALEPACK* (Otwinowski & Minor, 1997[@bb10]); data reduction: *DENZO*/*SCALEPACK*; program(s) used to solve structure: *SIR2004* (Burla *et al.*, 2005[@bb2]); program(s) used to refine structure: *SHELXL97* (Sheldrick, 2008[@bb11]); molecular graphics: *ORTEP-3 for Windows* (Farrugia, 2012[@bb4]); software used to prepare material for publication: *SHELXL97*.

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

Crystal structure: contains datablock(s) I, global. DOI: [10.1107/S1600536814000816/hy2641sup1.cif](http://dx.doi.org/10.1107/S1600536814000816/hy2641sup1.cif)

Structure factors: contains datablock(s) I. DOI: [10.1107/S1600536814000816/hy2641Isup2.hkl](http://dx.doi.org/10.1107/S1600536814000816/hy2641Isup2.hkl)

CCDC reference: <http://scripts.iucr.org/cgi-bin/cr.cgi?rm=csd&csdid=981323>

Additional supporting information: [crystallographic information](http://scripts.iucr.org/cgi-bin/sendsupfiles?hy2641&file=hy2641sup0.html&mime=text/html); [3D view](http://scripts.iucr.org/cgi-bin/sendcif?hy2641sup1&Qmime=cif); [checkCIF report](http://scripts.iucr.org/cgi-bin/paper?hy2641&checkcif=yes)

Supporting information for this paper is available from the IUCr electronic archives (Reference: [HY2641](http://scripts.iucr.org/cgi-bin/sendsup?hy2641)).

The authors thank the Ministry of Education and Science of Ukraine for financial support (grant No. F28/241--2009).

1. Comment
==========

Compound with the same symmetry and similar coordination environment as in the title compound was studied in the work of Boyle *et al.* (2002). However it has tin atoms with equal oxidation state, in opposite with our compound, which has different oxidation states and coordination environments of metal atoms. The same situation persists with other compounds of tin and titanium with similar coordination geometry and identical oxidation states of the metal atoms (Eslava *et al.*, 2010; Fric & Schubert, 2008; Harrison *et al.*, 1978; Mijatovic *et al.*, 2001; Mokal *et al.*, 1994; Vatsa *et al.*, 1991; Verdenelli *et al.*, 2000). The title compound has two types of tin atoms. The Sn^II^ atom is three-coordinated and has a trigonal-pyramidal environment. The Sn^IV^ atom is hexa-coordinated and has an octahedral environment. Literature search did not provide any information about similar compounds, which have simultaneously two tin atoms with different oxidation states. In the title compound this is possible due to two chloride atoms for each Sn^IV^ atom.

2. Experimental {#experimental}
===============

To a solution of (diisopropoxydichlorido)tin (1.54 g, 5 mmol) in 5 ml of toluene was added N,N,N-tris(trimethylsilyl)aminoiminophosphorane (0.695 g, 2.5 mmol) in 3 ml of toluene and stirred for 4 h. The resulting solution was concentrated to 4 ml and cooled to -25°C. After two days, resulting crystals were filtered from the solution and dried in vacuum (yield: 0.454 g, 41%). Analysis, calculated for C~12~H~28~Cl~4~O~6~Sn~4~: C 16.26, H 3.16, Cl 16.03, O 10.83, Sn 53.72%; found: C 16.01, H 3.56, Cl 16.25, O 10.94, Sn 53.24%.

3. Refinement {#refinement}
=============

H atoms were positioned geometrically and refined as riding atoms, with C---H = 0.98 (CH~2~) and 0.96 (CH~3~) Å and with *U*~iso~(H) = 1.2(1.5 for methyl)*U*~eq~(C).

Figures
=======

![The molecular structure of the title compound, with displacement ellipsoids drawn at the 50% probability level. H atoms have been omitted. \[Symmetry code: (i) 1-x, 1-y, 1-z.\]](e-70-00m45-fig1){#Fap1}

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

  ---------------------------------- ---------------------------------------
  \[Sn~4~(C~3~H~7~O)~4~Cl~4~O~2~\]   *F*(000) = 832
  *M~r~* = 884.98                    *D*~x~ = 2.272 Mg m^−3^
  Monoclinic, *P*2~1~/*c*            Mo *K*α radiation, λ = 0.71073 Å
  Hall symbol: -P 2ybc               Cell parameters from 3853 reflections
  *a* = 6.4423 (3) Å                 θ = 2.1--31.1°
  *b* = 17.8302 (7) Å                µ = 4.25 mm^−1^
  *c* = 11.6843 (5) Å                *T* = 296 K
  β = 105.474 (2)°                   Block, colorless
  *V* = 1293.5 (1) Å^3^              0.36 × 0.17 × 0.12 mm
  *Z* = 2                            
  ---------------------------------- ---------------------------------------

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

  ----------------------------------------------------------------------------------- --------------------------------------
  Nonius KappaCCD diffractometer                                                      3853 independent reflections
  Radiation source: fine-focus sealed tube                                            2930 reflections with *I* \> 2σ(*I*)
  Graphite monochromator                                                              *R*~int~ = 0.041
  φ and ω scans with κ offset                                                         θ~max~ = 31.1°, θ~min~ = 2.1°
  Absorption correction: multi-scan (*DENZO*/*SCALEPACK*; Otwinowski & Minor, 1997)   *h* = −9→9
  *T*~min~ = 0.310, *T*~max~ = 0.629                                                  *k* = −25→21
  14221 measured reflections                                                          *l* = −16→15
  ----------------------------------------------------------------------------------- --------------------------------------

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*\[*F*^2^ \> 2σ(*F*^2^)\] = 0.038   Hydrogen site location: inferred from neighbouring sites
  *wR*(*F*^2^) = 0.061                  H-atom parameters constrained
  *S* = 1.10                            *w* = 1/\[σ^2^(*F*~o~^2^) + (0.*P*)^2^ + 2.1387*P*\] where *P* = (*F*~o~^2^ + 2*F*~c~^2^)/3
  3853 reflections                      (Δ/σ)~max~ = 0.001
  118 parameters                        Δρ~max~ = 0.93 e Å^−3^
  0 restraints                          Δρ~min~ = −0.80 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~   
  Sn1   0.47306 (5)   0.589199 (15)   0.51770 (2)    0.02814 (8)          
  Sn2   0.07243 (5)   0.494763 (16)   0.33749 (3)    0.03368 (8)          
  Cl1   0.1984 (2)    0.65257 (7)     0.58158 (12)   0.0527 (3)           
  Cl2   0.6589 (2)    0.69913 (7)     0.49108 (12)   0.0538 (3)           
  O1    0.6730 (5)    0.57626 (15)    0.6906 (2)     0.0358 (7)           
  O2    0.2858 (5)    0.58942 (15)    0.3422 (2)     0.0347 (7)           
  O3    0.2987 (4)    0.48801 (13)    0.5045 (2)     0.0271 (6)           
  C1    0.6845 (8)    0.6280 (3)      0.7884 (4)     0.0430 (11)          
  H1    0.6029        0.6732          0.7566         0.052\*              
  C2    0.9156 (9)    0.6503 (3)      0.8431 (5)     0.0674 (17)          
  H2A   0.9729        0.6733          0.7838         0.101\*              
  H2B   0.9987        0.6065          0.8737         0.101\*              
  H2C   0.9223        0.6852          0.9066         0.101\*              
  C3    0.5808 (11)   0.5926 (4)      0.8751 (5)     0.083 (2)            
  H3A   0.4334        0.5810          0.8360         0.124\*              
  H3B   0.5860        0.6268          0.9393         0.124\*              
  H3C   0.6562        0.5474          0.9056         0.124\*              
  C4    0.2592 (8)    0.6511 (2)      0.2583 (4)     0.0423 (11)          
  H4    0.3093        0.6973          0.3024         0.051\*              
  C5    0.3896 (12)   0.6379 (4)      0.1741 (6)     0.100 (3)            
  H5A   0.5384        0.6332          0.2170         0.150\*              
  H5B   0.3728        0.6794          0.1199         0.150\*              
  H5C   0.3425        0.5926          0.1304         0.150\*              
  C6    0.0244 (10)   0.6592 (3)      0.1970 (6)     0.086 (2)            
  H6A   −0.0541       0.6678          0.2549         0.130\*              
  H6B   −0.0269       0.6142          0.1536         0.130\*              
  H6C   0.0039        0.7009          0.1431         0.130\*              
  ----- ------------- --------------- -------------- -------------------- --

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

  ----- -------------- -------------- -------------- --------------- -------------- ---------------
        *U*^11^        *U*^22^        *U*^33^        *U*^12^         *U*^13^        *U*^23^
  Sn1   0.02865 (15)   0.02228 (14)   0.03221 (15)   0.00089 (12)    0.00591 (11)   −0.00050 (12)
  Sn2   0.03055 (16)   0.03210 (16)   0.03533 (16)   −0.00024 (13)   0.00347 (12)   0.00033 (13)
  Cl1   0.0432 (7)     0.0410 (7)     0.0770 (9)     0.0083 (5)      0.0215 (6)     −0.0119 (6)
  Cl2   0.0424 (7)     0.0356 (6)     0.0738 (9)     −0.0129 (5)     −0.0009 (6)    0.0116 (6)
  O1    0.0380 (17)    0.0359 (17)    0.0309 (15)    0.0064 (13)     0.0044 (13)    −0.0096 (13)
  O2    0.0364 (17)    0.0268 (15)    0.0370 (15)    −0.0058 (13)    0.0032 (13)    0.0050 (13)
  O3    0.0297 (15)    0.0200 (14)    0.0302 (14)    0.0016 (11)     0.0058 (11)    −0.0004 (11)
  C1    0.053 (3)      0.040 (3)      0.033 (2)      0.007 (2)       0.005 (2)      −0.014 (2)
  C2    0.062 (4)      0.076 (4)      0.060 (3)      −0.013 (3)      0.011 (3)      −0.035 (3)
  C3    0.103 (5)      0.098 (5)      0.058 (3)      −0.031 (4)      0.042 (4)      −0.035 (3)
  C4    0.049 (3)      0.031 (2)      0.042 (3)      −0.003 (2)      0.003 (2)      0.014 (2)
  C5    0.137 (7)      0.088 (5)      0.102 (5)      0.023 (5)       0.078 (5)      0.041 (4)
  C6    0.079 (5)      0.064 (4)      0.093 (5)      0.004 (3)       −0.017 (4)     0.042 (4)
  ----- -------------- -------------- -------------- --------------- -------------- ---------------

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

  ---------------------------- -------------- --------------------------- --------------
  Sn1---O1                     2.099 (3)      C2---H2A                    0.9600
  Sn1---O2                     2.084 (3)      C2---H2B                    0.9600
  Sn1---O3                     2.109 (2)      C2---H2C                    0.9600
  Sn1---O3^i^                  2.081 (3)      C3---H3A                    0.9600
  Sn1---Cl1                    2.3808 (12)    C3---H3B                    0.9600
  Sn1---Cl2                    2.3604 (11)    C3---H3C                    0.9600
  Sn1---Sn1^i^                 3.2382 (5)     C4---C5                     1.473 (7)
  Sn2---O1^i^                  2.165 (3)      C4---C6                     1.498 (7)
  Sn2---O2                     2.168 (3)      C4---H4                     0.9800
  Sn2---O3                     2.105 (2)      C5---H5A                    0.9600
  O1---C1                      1.456 (5)      C5---H5B                    0.9600
  O2---C4                      1.453 (5)      C5---H5C                    0.9600
  C1---C3                      1.494 (7)      C6---H6A                    0.9600
  C1---C2                      1.508 (7)      C6---H6B                    0.9600
  C1---H1                      0.9800         C6---H6C                    0.9600
                                                                          
  O3^i^---Sn1---O2             96.97 (10)     C3---C1---C2                113.2 (4)
  O3^i^---Sn1---O1             76.99 (10)     O1---C1---H1                108.3
  O2---Sn1---O1                173.28 (10)    C3---C1---H1                108.3
  O3^i^---Sn1---O3             78.77 (11)     C2---C1---H1                108.3
  O2---Sn1---O3                76.86 (10)     C1---C2---H2A               109.5
  O1---Sn1---O3                98.87 (10)     C1---C2---H2B               109.5
  O3^i^---Sn1---Cl2            97.63 (8)      H2A---C2---H2B              109.5
  O2---Sn1---Cl2               92.84 (8)      C1---C2---H2C               109.5
  O1---Sn1---Cl2               90.89 (9)      H2A---C2---H2C              109.5
  O3---Sn1---Cl2               168.46 (7)     H2B---C2---H2C              109.5
  O3^i^---Sn1---Cl1            164.20 (8)     C1---C3---H3A               109.5
  O2---Sn1---Cl1               91.38 (9)      C1---C3---H3B               109.5
  O1---Sn1---Cl1               93.83 (8)      H3A---C3---H3B              109.5
  O3---Sn1---Cl1               90.17 (8)      C1---C3---H3C               109.5
  Cl2---Sn1---Cl1              95.32 (5)      H3A---C3---H3C              109.5
  O3^i^---Sn1---Sn1^i^         39.70 (7)      H3B---C3---H3C              109.5
  O2---Sn1---Sn1^i^            85.98 (7)      O2---C4---C5                110.1 (4)
  O1---Sn1---Sn1^i^            87.47 (7)      O2---C4---C6                108.6 (4)
  O3---Sn1---Sn1^i^            39.06 (7)      C5---C4---C6                112.3 (5)
  Cl2---Sn1---Sn1^i^           136.34 (4)     O2---C4---H4                108.6
  Cl1---Sn1---Sn1^i^           128.33 (3)     C5---C4---H4                108.6
  O3---Sn2---O1^i^             75.04 (10)     C6---C4---H4                108.6
  O3---Sn2---O2                75.14 (10)     C4---C5---H5A               109.5
  O1^i^---Sn2---O2             87.61 (11)     C4---C5---H5B               109.5
  C1---O1---Sn1                125.2 (2)      H5A---C5---H5B              109.5
  C1---O1---Sn2^i^             127.4 (3)      C4---C5---H5C               109.5
  Sn1---O1---Sn2^i^            102.33 (11)    H5A---C5---H5C              109.5
  C4---O2---Sn1                126.8 (2)      H5B---C5---H5C              109.5
  C4---O2---Sn2                127.8 (2)      C4---C6---H6A               109.5
  Sn1---O2---Sn2               102.71 (11)    C4---C6---H6B               109.5
  Sn1^i^---O3---Sn2            105.05 (11)    H6A---C6---H6B              109.5
  Sn1^i^---O3---Sn1            101.23 (11)    C4---C6---H6C               109.5
  Sn2---O3---Sn1               104.02 (10)    H6A---C6---H6C              109.5
  O1---C1---C3                 109.0 (4)      H6B---C6---H6C              109.5
  O1---C1---C2                 109.7 (4)                                  
                                                                          
  O3^i^---Sn1---O1---C1        162.0 (3)      O1^i^---Sn2---O3---Sn1^i^   −5.91 (11)
  O3---Sn1---O1---C1           −121.8 (3)     O2---Sn2---O3---Sn1^i^      −97.42 (13)
  Cl2---Sn1---O1---C1          64.4 (3)       O1^i^---Sn2---O3---Sn1      100.06 (12)
  Cl1---Sn1---O1---C1          −31.0 (3)      O2---Sn2---O3---Sn1         8.55 (10)
  Sn1^i^---Sn1---O1---C1       −159.3 (3)     O3^i^---Sn1---O3---Sn1^i^   0.0
  O3^i^---Sn1---O1---Sn2^i^    5.81 (11)      O2---Sn1---O3---Sn1^i^      99.98 (12)
  O3---Sn1---O1---Sn2^i^       82.02 (12)     O1---Sn1---O3---Sn1^i^      −74.73 (11)
  Cl2---Sn1---O1---Sn2^i^      −91.81 (10)    Cl2---Sn1---O3---Sn1^i^     72.8 (4)
  Cl1---Sn1---O1---Sn2^i^      172.79 (10)    Cl1---Sn1---O3---Sn1^i^     −168.64 (9)
  Sn1^i^---Sn1---O1---Sn2^i^   44.54 (9)      O3^i^---Sn1---O3---Sn2      −108.82 (14)
  O3^i^---Sn1---O2---C4        −112.5 (3)     O2---Sn1---O3---Sn2         −8.83 (11)
  O3---Sn1---O2---C4           170.8 (3)      O1---Sn1---O3---Sn2         176.45 (11)
  Cl2---Sn1---O2---C4          −14.4 (3)      Cl2---Sn1---O3---Sn2        −36.0 (4)
  Cl1---Sn1---O2---C4          81.0 (3)       Cl1---Sn1---O3---Sn2        82.55 (10)
  Sn1^i^---Sn1---O2---C4       −150.7 (3)     Sn1^i^---Sn1---O3---Sn2     −108.82 (14)
  O3^i^---Sn1---O2---Sn2       85.22 (12)     Sn1---O1---C1---C3          108.1 (4)
  O3---Sn1---O2---Sn2          8.53 (10)      Sn2^i^---O1---C1---C3       −101.7 (4)
  Cl2---Sn1---O2---Sn2         −176.73 (10)   Sn1---O1---C1---C2          −127.4 (4)
  Cl1---Sn1---O2---Sn2         −81.33 (10)    Sn2^i^---O1---C1---C2       22.8 (5)
  Sn1^i^---Sn1---O2---Sn2      47.00 (9)      Sn1---O2---C4---C5          102.9 (5)
  O3---Sn2---O2---C4           −170.6 (3)     Sn2---O2---C4---C5          −99.2 (5)
  O1^i^---Sn2---O2---C4        114.2 (3)      Sn1---O2---C4---C6          −133.8 (4)
  O3---Sn2---O2---Sn1          −8.61 (10)     Sn2---O2---C4---C6          24.1 (5)
  O1^i^---Sn2---O2---Sn1       −83.76 (12)                                
  ---------------------------- -------------- --------------------------- --------------

Symmetry code: (i) −*x*+1, −*y*+1, −*z*+1.

###### Selected bond lengths (Å)

  ------------- -------------
  Sn1---O1      2.099 (3)
  Sn1---O2      2.084 (3)
  Sn1---O3      2.109 (2)
  Sn1---O3^i^   2.081 (3)
  Sn1---Cl1     2.3808 (12)
  Sn1---Cl2     2.3604 (11)
  Sn2---O1^i^   2.165 (3)
  Sn2---O2      2.168 (3)
  Sn2---O3      2.105 (2)
  ------------- -------------

Symmetry code: (i) .
