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

For the magnetic properties of metal complexes with tris­(2-pyridyl­meth­yl)amine and thio­cyanate ligands, see: Boldog *et al.* (2009[@bb2]); Li *et al.* (2010[@bb3]). For related complexes, see: Benhamou *et al.* (2008[@bb1]); Min *et al.* (2008[@bb4]); Phan *et al.* (2012[@bb5]); Wei *et al.* (2011[@bb8]).

Experimental   {#sec2}
==============

 {#sec2.1}

### Crystal data   {#sec2.1.1}

\[Fe(NCS)~2~(C~18~H~18~N~4~)\]*M* *~r~* = 462.37Monoclinic,*a* = 23.714 (5) Å*b* = 11.827 (2) Å*c* = 17.580 (3) Åβ = 112.87 (3)°*V* = 4543.0 (18) Å^3^*Z* = 8Mo *K*α radiationμ = 0.87 mm^−1^*T* = 123 K0.20 × 0.20 × 0.10 mm

### Data collection   {#sec2.1.2}

Rigaku Saturn70 diffractometerAbsorption correction: multi-scan (*CrystalClear*; Rigaku, 2008[@bb6]) *T* ~min~ = 0.84, *T* ~max~ = 0.9210256 measured reflections4456 independent reflections3275 reflections with *I* \> 2σ(*I*)*R* ~int~ = 0.059

### Refinement   {#sec2.1.3}

*R*\[*F* ^2^ \> 2σ(*F* ^2^)\] = 0.069*wR*(*F* ^2^) = 0.203*S* = 1.114456 reflections283 parametersH atoms treated by a mixture of independent and constrained refinementΔρ~max~ = 0.42 e Å^−3^Δρ~min~ = −0.47 e Å^−3^

 {#d5e514}

Data collection: *CrystalClear* (Rigaku, 2008[@bb6]); cell refinement: *CrystalClear*; data reduction: *CrystalClear*; program(s) used to solve structure: *SHELXTL* (Sheldrick, 2008[@bb7]); program(s) used to refine structure: *SHELXTL*; molecular graphics: *SHELXTL*; software used to prepare material for publication: *SHELXTL*.

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

Crystal structure: contains datablock(s) I, global. DOI: [10.1107/S1600536813034818/xu5762sup1.cif](http://dx.doi.org/10.1107/S1600536813034818/xu5762sup1.cif)

Structure factors: contains datablock(s) I. DOI: [10.1107/S1600536813034818/xu5762Isup2.hkl](http://dx.doi.org/10.1107/S1600536813034818/xu5762Isup2.hkl)

CCDC reference: <http://scripts.iucr.org/cgi-bin/cr.cgi?rm=csd&csdid=979003>

Additional supporting information: [crystallographic information](http://scripts.iucr.org/cgi-bin/sendsupfiles?xu5762&file=xu5762sup0.html&mime=text/html); [3D view](http://scripts.iucr.org/cgi-bin/sendcif?xu5762sup1&Qmime=cif); [checkCIF report](http://scripts.iucr.org/cgi-bin/paper?xu5762&checkcif=yes)

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: [XU5762](http://scripts.iucr.org/cgi-bin/sendsup?xu5762)).

The authors would like to thank the China Scholarship Council (CSC).

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

A series of iron complexes with the tris(2-pyridylmethyl)amine (tpa) ligands (Benhamou *et al.*, 2008; Boldog *et al.*, 2009; Li *et al.*, 2010; Min *et al.*, 2008; Phan *et al.*, 2012; Wei *et al.*, 2011) that exhibit interesting magnetic properties have been synthesized and structurally characterized. In these complexes, the tpa ligands coordinate to the metal centers through its pyridyl nitrogen atoms and arylamine nitrogen atom. It should be noted that the magnetic behavior of the Fe(II) spin crossover complex with the ligand tpa and thiocyanato has already been reported (Boldog *et al.*, 2009; Li *et al.*, 2010).

In the title compound, Fe(C~18~H~18~N~4~)(NCS)~2~, the Fe(II) atom is coordinated by six nitrogen atoms (Fig. 1). The Fe-N distances range from 2.054 (5) to 2.241 (4) Å. In the crystal, π-π stacking 3.653 (3) Å between parallel pyridine rings and weak C---H···S hydrogen bonds link the molecules into the two dimensional supramolecular structure (Fig. 2).

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

A mixture of FeSO~4~.7H~2~O (0.0281 g, 0.1 mmol), tris(2-pyridylmethyl)amine (tpa, 0.0291 g, 0.1 mmol), KSCN (0.0194 g, 0.2 mmol) and MeOH (5 mL) were sealed in a 25 mL Teflon reactor and heated at 160^o^C for 48 h, and then cooled to ambient temperature at a rate of *ca.* 10 ^o^C h^-1^ to give yellow block crystals (yield: 21%, based on tpa).

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

H2, H7, H8, H14, H16, H16A and H16B atoms were located in a difference Fourier map and refined isotropicaly with U~iso~(H) = 0.026 Å^2^. Other H atoms were placed at calculated positions and were treated as riding on the parent C atoms with C---H = 0.95--0.99 Å, U~iso~(H) = 1.2U~eq~(C).

Figures
=======

![Crystal structure of the title compound with labelling and displacement ellipsoids drawn at the 30% probability level.](e-70-00m35-fig1){#Fap1}

![Crystal packing of the title complex. Intermolecular C---H···S hydrogen bonds are shown as red dashed lines, and π--π stacking interactions between pyridine rings are shown as blue dashed lines.](e-70-00m35-fig2){#Fap2}

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

  -------------------------------- ---------------------------------------
  \[Fe(NCS)~2~(C~18~H~18~N~4~)\]   *F*(000) = 1904
  *M~r~* = 462.37                  *D*~x~ = 1.352 Mg m^−3^
  Monoclinic, *C*2/*c*             Mo *K*α radiation, λ = 0.71073 Å
  Hall symbol: -C 2yc              Cell parameters from 5300 reflections
  *a* = 23.714 (5) Å               θ = 3.1--27.5°
  *b* = 11.827 (2) Å               µ = 0.87 mm^−1^
  *c* = 17.580 (3) Å               *T* = 123 K
  β = 112.87 (3)°                  Block, yellow
  *V* = 4543.0 (18) Å^3^           0.20 × 0.20 × 0.10 mm
  *Z* = 8                          
  -------------------------------- ---------------------------------------

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

  ------------------------------------------------------------------ --------------------------------------
  Rigaku Saturn70 diffractometer                                     4456 independent reflections
  Radiation source: Rotating Anode                                   3275 reflections with *I* \> 2σ(*I*)
  Confocal monochromator                                             *R*~int~ = 0.059
  Detector resolution: 28.5714 pixels mm^-1^                         θ~max~ = 26.0°, θ~min~ = 3.1°
  dtprofit.ref scans                                                 *h* = −29→28
  Absorption correction: multi-scan (*CrystalClear*; Rigaku, 2008)   *k* = −13→14
  *T*~min~ = 0.84, *T*~max~ = 0.92                                   *l* = −21→15
  10256 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*\[*F*^2^ \> 2σ(*F*^2^)\] = 0.069   Hydrogen site location: inferred from neighbouring sites
  *wR*(*F*^2^) = 0.203                  H atoms treated by a mixture of independent and constrained refinement
  *S* = 1.11                            *w* = 1/\[σ^2^(*F*~o~^2^) + (0.0906*P*)^2^ + 9.7621*P*\] where *P* = (*F*~o~^2^ + 2*F*~c~^2^)/3
  4456 reflections                      (Δ/σ)~max~ \< 0.001
  283 parameters                        Δρ~max~ = 0.42 e Å^−3^
  0 restraints                          Δρ~min~ = −0.47 e Å^−3^
  ------------------------------------- -------------------------------------------------------------------------------------------------

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

  -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  Geometry. All e.s.d.\'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.\'s are taken into account individually in the estimation of e.s.d.\'s in distances, angles and torsion angles; correlations between e.s.d.\'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.\'s is used for estimating e.s.d.\'s 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^ \> σ(*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~   
  C1     0.4648 (2)     0.4925 (4)     0.3477 (3)     0.0314 (12)          
  H1     0.4527         0.5481         0.3053         0.038\*              
  C2     0.5264 (3)     0.4840 (6)     0.3995 (4)     0.0453 (16)          
  C3     0.5440 (3)     0.4028 (6)     0.4600 (4)     0.0500 (18)          
  H3     0.5858         0.3957         0.4960         0.060\*              
  C4     0.5011 (3)     0.3321 (5)     0.4683 (4)     0.0442 (15)          
  H4     0.5126         0.2749         0.5095         0.053\*              
  C5     0.4394 (2)     0.3459 (4)     0.4144 (3)     0.0291 (11)          
  C6     0.3910 (3)     0.2752 (5)     0.4272 (3)     0.0308 (12)          
  C7     0.3845 (3)     0.2760 (5)     0.1662 (4)     0.0365 (13)          
  C8     0.4054 (3)     0.1794 (5)     0.1395 (4)     0.0515 (18)          
  C9     0.3991 (3)     0.0772 (5)     0.1708 (4)     0.0537 (19)          
  H9     0.4129         0.0104         0.1534         0.064\*              
  C10    0.3727 (3)     0.0710 (4)     0.2277 (4)     0.0394 (14)          
  H10    0.3684         0.0003         0.2507         0.047\*              
  C11    0.3524 (2)     0.1698 (4)     0.2509 (3)     0.0269 (11)          
  C12    0.3195 (2)     0.1693 (4)     0.3090 (3)     0.0301 (12)          
  H12A   0.2750         0.1604         0.2770         0.036\*              
  H12B   0.3337         0.1043         0.3473         0.036\*              
  C13    0.3010 (2)     0.6046 (4)     0.3840 (3)     0.0268 (11)          
  H13    0.3135         0.6574         0.3528         0.032\*              
  C14    0.2846 (3)     0.6447 (4)     0.4460 (4)     0.0334 (13)          
  C15    0.2664 (3)     0.5696 (4)     0.4917 (4)     0.0368 (13)          
  H15    0.2550         0.5950         0.5349         0.044\*              
  C16    0.2654 (3)     0.4564 (5)     0.4731 (4)     0.0374 (14)          
  C17    0.2822 (2)     0.4211 (4)     0.4102 (3)     0.0239 (10)          
  C18    0.2812 (3)     0.2989 (4)     0.3860 (4)     0.0322 (12)          
  H18A   0.2862         0.2501         0.4340         0.039\*              
  H18B   0.2412         0.2809         0.3414         0.039\*              
  C19    0.3519 (2)     0.6301 (4)     0.1751 (3)     0.0280 (11)          
  C20    0.1843 (2)     0.3861 (4)     0.1455 (3)     0.0283 (11)          
  Fe1    0.32597 (3)    0.41694 (5)    0.26973 (4)    0.0221 (2)           
  H2     0.550 (2)      0.542 (4)      0.396 (3)      0.026\*              
  H7     0.391 (2)      0.349 (5)      0.147 (3)      0.026\*              
  H8     0.416 (2)      0.182 (4)      0.092 (3)      0.026\*              
  H14    0.287 (2)      0.726 (4)      0.459 (3)      0.026\*              
  H16    0.248 (2)      0.408 (4)      0.495 (3)      0.026\*              
  H6A    0.405 (2)      0.203 (5)      0.442 (3)      0.026\*              
  H6B    0.382 (2)      0.298 (4)      0.469 (3)      0.026\*              
  N1     0.42170 (18)   0.4244 (3)     0.3555 (3)     0.0259 (9)           
  N2     0.35696 (18)   0.2708 (3)     0.2191 (3)     0.0256 (9)           
  N3     0.30029 (17)   0.4938 (3)     0.3656 (2)     0.0201 (8)           
  N4     0.33090 (18)   0.2760 (3)     0.3573 (3)     0.0240 (9)           
  N5     0.3355 (2)     0.5542 (4)     0.2041 (3)     0.0376 (11)          
  N6     0.23443 (19)   0.3841 (3)     0.1954 (3)     0.0303 (10)          
  S1     0.37451 (7)    0.73656 (12)   0.13592 (10)   0.0415 (4)           
  S2     0.11437 (7)    0.39138 (13)   0.07738 (11)   0.0517 (5)           
  ------ -------------- -------------- -------------- -------------------- --

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

  ----- ------------- ------------- ------------- -------------- ------------- --------------
        *U*^11^       *U*^22^       *U*^33^       *U*^12^        *U*^13^       *U*^23^
  C1    0.029 (3)     0.035 (3)     0.030 (3)     −0.009 (2)     0.012 (2)     −0.006 (2)
  C2    0.026 (3)     0.060 (4)     0.048 (4)     −0.013 (3)     0.013 (3)     −0.030 (3)
  C3    0.023 (3)     0.081 (5)     0.042 (4)     0.005 (3)      0.008 (3)     −0.028 (4)
  C4    0.032 (3)     0.060 (4)     0.034 (3)     0.021 (3)      0.007 (3)     −0.008 (3)
  C5    0.029 (3)     0.032 (3)     0.023 (3)     0.010 (2)      0.007 (2)     −0.004 (2)
  C6    0.040 (3)     0.028 (3)     0.022 (3)     0.010 (2)      0.010 (2)     0.007 (2)
  C7    0.049 (3)     0.031 (3)     0.033 (3)     0.000 (2)      0.021 (3)     0.002 (2)
  C8    0.084 (5)     0.038 (3)     0.054 (4)     0.001 (3)      0.050 (4)     −0.003 (3)
  C9    0.090 (5)     0.030 (3)     0.063 (5)     0.015 (3)      0.053 (4)     0.003 (3)
  C10   0.060 (4)     0.025 (3)     0.044 (4)     0.002 (3)      0.033 (3)     −0.003 (2)
  C11   0.034 (3)     0.021 (2)     0.026 (3)     0.001 (2)      0.011 (2)     −0.002 (2)
  C12   0.043 (3)     0.020 (2)     0.032 (3)     −0.002 (2)     0.019 (3)     0.002 (2)
  C13   0.033 (3)     0.021 (2)     0.025 (3)     −0.002 (2)     0.009 (2)     0.006 (2)
  C14   0.042 (3)     0.019 (3)     0.042 (3)     0.009 (2)      0.019 (3)     −0.001 (2)
  C15   0.053 (4)     0.027 (3)     0.038 (3)     0.008 (2)      0.026 (3)     0.002 (2)
  C16   0.053 (4)     0.025 (3)     0.046 (4)     0.005 (2)      0.032 (3)     0.008 (3)
  C17   0.026 (3)     0.019 (2)     0.025 (3)     0.0048 (19)    0.008 (2)     0.003 (2)
  C18   0.048 (3)     0.020 (2)     0.042 (3)     −0.006 (2)     0.032 (3)     0.001 (2)
  C19   0.032 (3)     0.031 (3)     0.018 (3)     0.003 (2)      0.005 (2)     −0.001 (2)
  C20   0.034 (3)     0.018 (2)     0.032 (3)     −0.001 (2)     0.012 (3)     −0.006 (2)
  Fe1   0.0252 (4)    0.0184 (4)    0.0213 (4)    −0.0012 (3)    0.0075 (3)    0.0002 (3)
  N1    0.024 (2)     0.027 (2)     0.024 (2)     −0.0009 (17)   0.0062 (18)   −0.0084 (18)
  N2    0.034 (2)     0.0190 (19)   0.023 (2)     −0.0005 (17)   0.0102 (19)   0.0027 (17)
  N3    0.0198 (19)   0.0190 (19)   0.018 (2)     −0.0029 (15)   0.0035 (16)   0.0009 (16)
  N4    0.029 (2)     0.0165 (19)   0.028 (2)     0.0000 (16)    0.0131 (19)   0.0017 (17)
  N5    0.044 (3)     0.033 (2)     0.038 (3)     0.002 (2)      0.017 (2)     0.004 (2)
  N6    0.028 (2)     0.022 (2)     0.032 (3)     −0.0008 (17)   0.002 (2)     −0.0096 (18)
  S1    0.0507 (9)    0.0343 (8)    0.0475 (9)    −0.0017 (6)    0.0279 (8)    0.0099 (7)
  S2    0.0352 (9)    0.0469 (9)    0.0526 (11)   0.0060 (7)     −0.0051 (8)   −0.0199 (8)
  ----- ------------- ------------- ------------- -------------- ------------- --------------

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

  ------------------- ------------ ------------------- -------------
  C1---N1             1.350 (6)    C12---H12A          0.9900
  C1---C2             1.393 (8)    C12---H12B          0.9900
  C1---H1             0.9500       C13---N3            1.349 (6)
  C2---C3             1.372 (10)   C13---C14           1.377 (7)
  C2---H2             0.91 (5)     C13---H13           0.9500
  C3---C4             1.367 (9)    C14---C15           1.373 (8)
  C3---H3             0.9500       C14---H14           0.98 (5)
  C4---C5             1.409 (7)    C15---C16           1.376 (7)
  C4---H4             0.9500       C15---H15           0.9500
  C5---N1             1.332 (7)    C16---C17           1.378 (7)
  C5---C6             1.506 (7)    C16---H16           0.87 (5)
  C6---N4             1.476 (6)    C17---N3            1.341 (6)
  C6---H6A            0.91 (5)     C17---C18           1.504 (6)
  C6---H6B            0.88 (5)     C18---N4            1.477 (6)
  C7---N2             1.330 (7)    C18---H18A          0.9900
  C7---C8             1.396 (8)    C18---H18B          0.9900
  C7---H7             0.96 (5)     C19---N5            1.172 (7)
  C8---C9             1.361 (9)    C19---S1            1.623 (5)
  C8---H8             0.97 (5)     C20---N6            1.172 (7)
  C9---C10            1.373 (8)    C20---S2            1.626 (6)
  C9---H9             0.9500       Fe1---N1            2.185 (4)
  C10---C11           1.385 (7)    Fe1---N2            2.197 (4)
  C10---H10           0.9500       Fe1---N3            2.199 (4)
  C11---N2            1.341 (6)    Fe1---N4            2.241 (4)
  C11---C12           1.509 (7)    Fe1---N5            2.054 (5)
  C12---N4            1.485 (6)    Fe1---N6            2.089 (4)
                                                       
  N1---C1---C2        122.2 (5)    C14---C15---H15     120.9
  N1---C1---H1        118.9        C16---C15---H15     120.9
  C2---C1---H1        118.9        C15---C16---C17     120.0 (5)
  C3---C2---C1        118.8 (6)    C15---C16---H16     120 (3)
  C3---C2---H2        125 (4)      C17---C16---H16     119 (3)
  C1---C2---H2        115 (4)      N3---C17---C16      122.3 (4)
  C4---C3---C2        119.8 (6)    N3---C17---C18      115.1 (4)
  C4---C3---H3        120.1        C16---C17---C18     122.6 (4)
  C2---C3---H3        120.1        N4---C18---C17      110.2 (4)
  C3---C4---C5        118.6 (6)    N4---C18---H18A     109.6
  C3---C4---H4        120.7        C17---C18---H18A    109.6
  C5---C4---H4        120.7        N4---C18---H18B     109.6
  N1---C5---C4        122.3 (5)    C17---C18---H18B    109.6
  N1---C5---C6        118.3 (4)    H18A---C18---H18B   108.1
  C4---C5---C6        119.2 (5)    N5---C19---S1       179.1 (5)
  N4---C6---C5        114.7 (4)    N6---C20---S2       178.7 (5)
  N4---C6---H6A       111 (3)      N5---Fe1---N6       96.34 (18)
  C5---C6---H6A       111 (3)      N5---Fe1---N1       92.51 (18)
  N4---C6---H6B       103 (3)      N6---Fe1---N1       170.87 (16)
  C5---C6---H6B       113 (3)      N5---Fe1---N2       105.47 (17)
  H6A---C6---H6B      102 (5)      N6---Fe1---N2       91.73 (15)
  N2---C7---C8        122.2 (5)    N1---Fe1---N2       83.71 (15)
  N2---C7---H7        119 (3)      N5---Fe1---N3       103.16 (16)
  C8---C7---H7        119 (3)      N6---Fe1---N3       91.49 (15)
  C9---C8---C7        118.8 (6)    N1---Fe1---N3       88.68 (14)
  C9---C8---H8        119 (3)      N2---Fe1---N3       150.64 (14)
  C7---C8---H8        121 (3)      N5---Fe1---N4       170.32 (17)
  C8---C9---C10       119.7 (5)    N6---Fe1---N4       93.18 (16)
  C8---C9---H9        120.2        N1---Fe1---N4       78.06 (15)
  C10---C9---H9       120.2        N2---Fe1---N4       75.94 (14)
  C9---C10---C11      118.6 (5)    N3---Fe1---N4       74.74 (14)
  C9---C10---H10      120.7        C5---N1---C1        118.2 (5)
  C11---C10---H10     120.7        C5---N1---Fe1       116.0 (3)
  N2---C11---C10      122.4 (5)    C1---N1---Fe1       125.3 (4)
  N2---C11---C12      115.6 (4)    C7---N2---C11       118.3 (4)
  C10---C11---C12     121.8 (4)    C7---N2---Fe1       125.5 (3)
  N4---C12---C11      110.9 (4)    C11---N2---Fe1      116.0 (3)
  N4---C12---H12A     109.5        C17---N3---C13      117.3 (4)
  C11---C12---H12A    109.5        C17---N3---Fe1      115.5 (3)
  N4---C12---H12B     109.5        C13---N3---Fe1      127.2 (3)
  C11---C12---H12B    109.5        C6---N4---C18       111.0 (4)
  H12A---C12---H12B   108.1        C6---N4---C12       111.9 (4)
  N3---C13---C14      122.9 (4)    C18---N4---C12      111.0 (4)
  N3---C13---H13      118.5        C6---N4---Fe1       110.6 (3)
  C14---C13---H13     118.5        C18---N4---Fe1      105.3 (3)
  C15---C14---C13     119.3 (5)    C12---N4---Fe1      106.9 (3)
  C15---C14---H14     120 (3)      C19---N5---Fe1      168.1 (4)
  C13---C14---H14     121 (3)      C20---N6---Fe1      165.9 (4)
  C14---C15---C16     118.2 (5)                        
  ------------------- ------------ ------------------- -------------

Hydrogen-bond geometry (Å, º) {#tablewraphbondslong}
=============================

  ----------------------- --------- --------- ----------- ---------------
  *D*---H···*A*           *D*---H   H···*A*   *D*···*A*   *D*---H···*A*
  C4---H4···S2^i^         0.95      2.98      3.725 (6)   136
  C12---H12*B*···S2^ii^   0.99      2.89      3.850 (5)   164
  C18---H18*B*···S1^ii^   0.99      2.97      3.635 (5)   126
  ----------------------- --------- --------- ----------- ---------------

Symmetry codes: (i) *x*+1/2, −*y*+1/2, *z*+1/2; (ii) −*x*+1/2, *y*−1/2, −*z*+1/2.

###### Selected bond lengths (Å)

  ---------- -----------
  Fe1---N1   2.185 (4)
  Fe1---N2   2.197 (4)
  Fe1---N3   2.199 (4)
  Fe1---N4   2.241 (4)
  Fe1---N5   2.054 (5)
  Fe1---N6   2.089 (4)
  ---------- -----------

###### Hydrogen-bond geometry (Å, °)

  *D*---H⋯*A*           *D*---H   H⋯*A*   *D*⋯*A*     *D*---H⋯*A*
  --------------------- --------- ------- ----------- -------------
  C4---H4⋯S2^i^         0.95      2.98    3.725 (6)   136
  C12---H12*B*⋯S2^ii^   0.99      2.89    3.850 (5)   164
  C18---H18*B*⋯S1^ii^   0.99      2.97    3.635 (5)   126

Symmetry codes: (i) ; (ii) .
