Bis(benzyl phenyl sulfoxide-κO)dichloridodiphenyl­tin(IV)

Dang, Y.-Q.

doi:10.1107/S1600536809039269

metal-organic compounds

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Volume 65| Part 11| November 2009| Page m1306

https://doi.org/10.1107/S1600536809039269

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Bis(benzyl phenyl sulfoxide-κO)dichloridodiphenyltin(IV)

Yan-Qiu Dang ^a ^*

^aDepartment of Chemistry & Chemical Engineering, Binzhou University, Binzhou 256600, People's Republic of China
^*Correspondence e-mail: yanqiudang@163.com

(Received 7 September 2009; accepted 27 September 2009; online 3 October 2009)

The molecule of the title compound, [Sn(C₆H₅)₂Cl₂(C₁₃H₁₂OS)₂], has crystallographic twofold symmetry. The Sn^IV atom is six-coordinate within a distored octahedral geometry defined by a C₂Cl₂O₂ donor set.

Related literature

For general background to organotin compounds and their applications, see: Davies (2004 ); Tian et al. (2005 ); Hadjikakou & Hadjiliadis (2009 ). For related structures, see: Ng & Rheingold (1989 ); Boa et al. (1995 ); Tian et al. (1998 ); Sadiq-ur-Rehman et al. (2007 ).

Experimental

Crystal data

[Sn(C₆H₅)₂Cl₂(C₁₃H₁₂OS)₂]
M_r = 776.40
Monoclinic, C 2/c
a = 22.7485 (19) Å
b = 11.5478 (14) Å
c = 16.984 (2) Å
β = 126.633 (6)°
V = 3580.3 (7) Å³
Z = 4
Mo Kα radiation
μ = 1.01 mm⁻¹
T = 295 K
0.25 × 0.22 × 0.11 mm

Data collection

Bruker SMART APEX area-detector diffractometer
Absorption correction: multi-scan (SADABS; Bruker, 2002 ) T_min = 0.786, T_max = 0.897
9821 measured reflections
3512 independent reflections
3003 reflections with I > 2σ(I)
R_int = 0.031

Refinement

R[F² > 2σ(F²)] = 0.032
wR(F²) = 0.076
S = 1.03
3512 reflections
204 parameters
H-atom parameters constrained
Δρ_max = 0.43 e Å⁻³
Δρ_min = −0.37 e Å⁻³

Data collection: SMART (Bruker, 2002); cell refinement: SAINT (Bruker, 2002); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997 ); software used to prepare material for publication: SHELXL97.

Supporting information

Crystal structure: contains datablocks global, I. DOI: https://doi.org/10.1107/S1600536809039269/tk2538sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536809039269/tk2538Isup2.hkl

checkCIF report

Comment top

Organotin compounds have received considerable attention due to their structural diversity as well as due to their industrial, agricultural and biological applications (Davies, 2004; Hadjikakou & Hadjiliadis, 2009; Tian et al., 2005). Several structures of organotin sulfoxide complexes, such as dichlorobis(dimethylsulfoxide-O)diphenyltin (Rehman et al., 2007), dichlorodimethyl(dibenzylsulfoxide-O)tin (Ng & Rheingold, 1989), [bis(phenylsulfinyl)ethane-O,O]dichlorodiphenyltin (Boa et al., 1995), and trichloro(dibutylsulfoxide)(ethoxycarbonylethyl)tin (Tian et al., 1998) have been reported. As a continuation of these studies, the structure of the title compound, (I), is described herein.

The molecule of (I), Fig. 1, has crystallographic twofold symmetry. The Sn atom is six-coordinate within a distorted C₂Cl₂O₂ octahedral geometry with trans phenyl groups, cis sulfoxides-O atoms, and cis chlorides. The Sn—C and Sn—Cl bond distances are similar to those found in dichlorobis(dimethylsulfoxide-O)diphenyltin (Rehman et al., 2007), but the Sn—O length is longer. The C1—Sn1—C1ⁱ and O1—Sn1—Clⁱ angles are 162.98 (14) and 172.95 (5)°, respectively; i: 2 - x, y, 1/2 - z. The dihedral angle between the phenyl rings in the sulfoxide ligand is 46.8 (3)°.

Related literature top

For general background to organotin compounds and their applications, see: Davies (2004); Tian et al. (2005); Hadjikakou & Hadjiliadis (2009). For related structures, see: Ng & Rheingold (1989); Boa et al. (1995); Tian et al. (1998); Rehman et al. (2007).

Experimental top

Benzylphenylsulfoxide (0.865 g, 4 mmol) and diphenyltin dichloride (0.687 g, 2 mmol) in ethanol (30 ml) were refluxed for 1 h, and then the colourless solution was condensed and cooled. The solid product was filtered off and recrystallized from methanol. The colourless crystals suitable for X-ray analysis were obtained from the same solvent by slow evaporation (yield 72%; m.p. 383–384 K).

Structure description top

For general background to organotin compounds and their applications, see: Davies (2004); Tian et al. (2005); Hadjikakou & Hadjiliadis (2009). For related structures, see: Ng & Rheingold (1989); Boa et al. (1995); Tian et al. (1998); Rehman et al. (2007).

Computing details top

Data collection: SMART (Bruker, 2002); cell refinement: SAINT (Bruker, 2002); data reduction: SAINT (Bruker, 2002); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).

Figures top

Fig. 1. The structure of (I) with displacement ellipsoids are drawn at the 30% probability level. The H atoms have been omitted for clarity. The molecule has crystallographic twofold symmetry. Symmetry operation i: 2 - x, y, 1/2 - z.

Bis(benzyl phenyl sulfoxide-κO)dichloridodiphenyltin(IV) top

Crystal data top

[Sn(C₆H₅)₂Cl₂(C₁₃H₁₂OS)₂]	F(000) = 1576
M_r = 776.40	D_x = 1.440 Mg m⁻³
Monoclinic, C2/c	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -C 2yc	Cell parameters from 3086 reflections
a = 22.7485 (19) Å	θ = 2.7–24.9°
b = 11.5478 (14) Å	µ = 1.01 mm⁻¹
c = 16.984 (2) Å	T = 295 K
β = 126.633 (6)°	Block, colourless
V = 3580.3 (7) Å³	0.25 × 0.22 × 0.11 mm
Z = 4

Data collection top

Bruker SMART APEX area-detector diffractometer	3512 independent reflections
Radiation source: fine-focus sealed tube	3003 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.031
φ and ω scans	θ_max = 26.0°, θ_min = 2.1°
Absorption correction: multi-scan (SADABS; Bruker, 2002)	h = −24→28
T_min = 0.786, T_max = 0.897	k = −14→12
9821 measured reflections	l = −20→20

Refinement top

Refinement on F²	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Secondary atom site location: difference Fourier map
R[F² > 2σ(F²)] = 0.032	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.076	H-atom parameters constrained
S = 1.03	w = 1/[σ²(F_o²) + (0.0324P)² + 1.727P] where P = (F_o² + 2F_c²)/3
3512 reflections	(Δ/σ)_max = 0.001
204 parameters	Δρ_max = 0.43 e Å⁻³
0 restraints	Δρ_min = −0.37 e Å⁻³

Crystal data top

[Sn(C₆H₅)₂Cl₂(C₁₃H₁₂OS)₂]	V = 3580.3 (7) Å³
M_r = 776.40	Z = 4
Monoclinic, C2/c	Mo Kα radiation
a = 22.7485 (19) Å	µ = 1.01 mm⁻¹
b = 11.5478 (14) Å	T = 295 K
c = 16.984 (2) Å	0.25 × 0.22 × 0.11 mm
β = 126.633 (6)°

Data collection top

Bruker SMART APEX area-detector diffractometer	3512 independent reflections
Absorption correction: multi-scan (SADABS; Bruker, 2002)	3003 reflections with I > 2σ(I)
T_min = 0.786, T_max = 0.897	R_int = 0.031
9821 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.032	0 restraints
wR(F²) = 0.076	H-atom parameters constrained
S = 1.03	Δρ_max = 0.43 e Å⁻³
3512 reflections	Δρ_min = −0.37 e Å⁻³
204 parameters

Special details top

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 F² against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F², conventional R-factors R are based on F, with F set to zero for negative F². The threshold expression of F² > σ(F²) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F² 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 (Å²) top

	x	y	z	U_iso*/U_eq
Sn1	1.0000	0.87434 (2)	0.2500	0.03980 (10)
Cl1	0.90700 (5)	1.01568 (7)	0.21844 (6)	0.0683 (2)
S1	0.84234 (4)	0.71126 (7)	0.15603 (5)	0.0544 (2)
O1	0.92338 (10)	0.72512 (16)	0.23458 (13)	0.0499 (5)
C1	1.04788 (14)	0.8471 (2)	0.40104 (18)	0.0396 (6)
C2	1.06132 (16)	0.9415 (2)	0.45947 (19)	0.0489 (7)
H2	1.0526	1.0158	0.4334	0.059*
C3	1.08741 (18)	0.9272 (3)	0.5554 (2)	0.0600 (8)
H3	1.0954	0.9916	0.5936	0.072*
C4	1.10169 (17)	0.8184 (3)	0.5954 (2)	0.0589 (8)
H4	1.1197	0.8089	0.6605	0.071*
C5	1.08941 (18)	0.7241 (3)	0.5389 (2)	0.0585 (8)
H5	1.0989	0.6502	0.5658	0.070*
C6	1.06288 (16)	0.7378 (2)	0.4418 (2)	0.0493 (7)
H6	1.0552	0.6732	0.4040	0.059*
C7	0.82742 (17)	0.5595 (3)	0.1480 (2)	0.0558 (8)
C8	0.7599 (2)	0.5161 (4)	0.0741 (3)	0.0748 (10)
H8	0.7222	0.5655	0.0287	0.090*
C9	0.7489 (3)	0.3981 (4)	0.0682 (4)	0.0967 (15)
H9	0.7028	0.3680	0.0198	0.116*
C10	0.8041 (3)	0.3252 (4)	0.1318 (4)	0.0978 (15)
H10	0.7960	0.2457	0.1265	0.117*
C11	0.8722 (3)	0.3686 (3)	0.2041 (3)	0.0867 (13)
H11	0.9103	0.3184	0.2472	0.104*
C12	0.8842 (2)	0.4863 (3)	0.2131 (2)	0.0645 (9)
H12	0.9301	0.5161	0.2624	0.077*
C13	0.79848 (19)	0.7551 (3)	0.2128 (3)	0.0685 (9)
H13A	0.8046	0.8381	0.2236	0.082*
H13B	0.7464	0.7400	0.1666	0.082*
C14	0.82573 (17)	0.6978 (2)	0.3077 (2)	0.0537 (7)
C15	0.8879 (2)	0.7370 (3)	0.3947 (3)	0.0699 (10)
H15	0.9147	0.7972	0.3940	0.084*
C16	0.9109 (2)	0.6882 (4)	0.4823 (3)	0.0849 (12)
H16	0.9526	0.7160	0.5407	0.102*
C17	0.8720 (2)	0.5978 (3)	0.4837 (3)	0.0789 (11)
H17	0.8873	0.5646	0.5431	0.095*
C18	0.8116 (2)	0.5575 (3)	0.3988 (3)	0.0715 (10)
H18	0.7855	0.4963	0.4000	0.086*
C19	0.7882 (2)	0.6056 (3)	0.3109 (3)	0.0637 (9)
H19	0.7469	0.5762	0.2529	0.076*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Sn1	0.04550 (17)	0.04045 (16)	0.03513 (15)	0.000	0.02496 (13)	0.000
Cl1	0.0833 (6)	0.0662 (5)	0.0587 (5)	0.0318 (4)	0.0441 (5)	0.0117 (4)
S1	0.0453 (4)	0.0608 (5)	0.0503 (4)	−0.0038 (3)	0.0249 (4)	0.0146 (3)
O1	0.0448 (11)	0.0542 (12)	0.0485 (11)	−0.0061 (9)	0.0266 (10)	0.0059 (9)
C1	0.0386 (15)	0.0442 (15)	0.0390 (14)	0.0034 (11)	0.0248 (13)	0.0039 (11)
C2	0.0582 (19)	0.0468 (16)	0.0419 (15)	0.0056 (14)	0.0301 (15)	0.0013 (12)
C3	0.062 (2)	0.070 (2)	0.0458 (17)	0.0032 (17)	0.0311 (16)	−0.0098 (16)
C4	0.0514 (19)	0.086 (2)	0.0390 (16)	0.0066 (17)	0.0267 (15)	0.0091 (16)
C5	0.061 (2)	0.0587 (19)	0.0521 (18)	0.0103 (15)	0.0313 (17)	0.0199 (15)
C6	0.0501 (17)	0.0461 (16)	0.0485 (16)	0.0052 (13)	0.0277 (15)	−0.0004 (13)
C7	0.059 (2)	0.065 (2)	0.0481 (17)	−0.0162 (16)	0.0346 (16)	−0.0010 (15)
C8	0.058 (2)	0.100 (3)	0.065 (2)	−0.026 (2)	0.0362 (19)	−0.015 (2)
C9	0.105 (4)	0.110 (4)	0.095 (3)	−0.063 (3)	0.070 (3)	−0.043 (3)
C10	0.156 (5)	0.071 (3)	0.108 (4)	−0.045 (3)	0.101 (4)	−0.023 (3)
C11	0.123 (4)	0.064 (2)	0.074 (3)	−0.012 (2)	0.060 (3)	0.0100 (19)
C12	0.074 (2)	0.058 (2)	0.0545 (19)	−0.0076 (17)	0.0350 (19)	0.0064 (16)
C13	0.058 (2)	0.059 (2)	0.095 (3)	0.0126 (16)	0.049 (2)	0.0185 (18)
C14	0.0533 (19)	0.0466 (17)	0.075 (2)	0.0061 (14)	0.0458 (18)	0.0034 (15)
C15	0.076 (2)	0.065 (2)	0.094 (3)	−0.0187 (18)	0.064 (2)	−0.019 (2)
C16	0.078 (3)	0.121 (3)	0.066 (2)	−0.013 (2)	0.049 (2)	−0.020 (2)
C17	0.097 (3)	0.086 (3)	0.080 (3)	0.005 (2)	0.067 (3)	0.005 (2)
C18	0.088 (3)	0.060 (2)	0.086 (3)	−0.0102 (19)	0.063 (2)	−0.0022 (19)
C19	0.063 (2)	0.058 (2)	0.077 (2)	−0.0051 (16)	0.046 (2)	−0.0049 (16)

Geometric parameters (Å, º) top

Sn1—C1	2.129 (2)	C8—H8	0.9300
Sn1—C1ⁱ	2.129 (2)	C9—C10	1.355 (7)
Sn1—O1	2.3519 (18)	C9—H9	0.9300
Sn1—O1ⁱ	2.3519 (18)	C10—C11	1.375 (6)
Sn1—Cl1ⁱ	2.4645 (8)	C10—H10	0.9300
Sn1—Cl1	2.4645 (8)	C11—C12	1.376 (4)
S1—O1	1.506 (2)	C11—H11	0.9300
S1—C7	1.775 (3)	C12—H12	0.9300
S1—C13	1.824 (3)	C13—C14	1.492 (4)
C1—C6	1.380 (4)	C13—H13A	0.9700
C1—C2	1.381 (4)	C13—H13B	0.9700
C2—C3	1.372 (4)	C14—C15	1.377 (5)
C2—H2	0.9300	C14—C19	1.386 (4)
C3—C4	1.372 (4)	C15—C16	1.370 (5)
C3—H3	0.9300	C15—H15	0.9300
C4—C5	1.364 (4)	C16—C17	1.379 (5)
C4—H4	0.9300	C16—H16	0.9300
C5—C6	1.387 (4)	C17—C18	1.349 (5)
C5—H5	0.9300	C17—H17	0.9300
C6—H6	0.9300	C18—C19	1.369 (5)
C7—C8	1.374 (4)	C18—H18	0.9300
C7—C12	1.379 (4)	C19—H19	0.9300
C8—C9	1.379 (5)

C1—Sn1—C1ⁱ	162.98 (14)	C7—C8—C9	118.8 (4)
C1—Sn1—O1	80.68 (8)	C7—C8—H8	120.6
C1ⁱ—Sn1—O1	86.85 (8)	C9—C8—H8	120.6
C1—Sn1—O1ⁱ	86.85 (8)	C10—C9—C8	121.0 (4)
C1ⁱ—Sn1—O1ⁱ	80.68 (8)	C10—C9—H9	119.5
O1—Sn1—O1ⁱ	85.78 (10)	C8—C9—H9	119.5
C1—Sn1—Cl1ⁱ	94.61 (7)	C9—C10—C11	120.0 (4)
C1ⁱ—Sn1—Cl1ⁱ	96.64 (7)	C9—C10—H10	120.0
O1—Sn1—Cl1ⁱ	172.95 (5)	C11—C10—H10	120.0
O1ⁱ—Sn1—Cl1ⁱ	88.74 (6)	C10—C11—C12	120.2 (4)
C1—Sn1—Cl1	96.64 (7)	C10—C11—H11	119.9
C1ⁱ—Sn1—Cl1	94.61 (7)	C12—C11—H11	119.9
O1—Sn1—Cl1	88.74 (6)	C11—C12—C7	119.2 (4)
O1ⁱ—Sn1—Cl1	172.95 (5)	C11—C12—H12	120.4
Cl1ⁱ—Sn1—Cl1	97.05 (5)	C7—C12—H12	120.4
O1—S1—C7	104.46 (13)	C14—C13—S1	116.2 (2)
O1—S1—C13	105.59 (14)	C14—C13—H13A	108.2
C7—S1—C13	100.05 (14)	S1—C13—H13A	108.2
S1—O1—Sn1	127.62 (10)	C14—C13—H13B	108.2
C6—C1—C2	118.6 (2)	S1—C13—H13B	108.2
C6—C1—Sn1	122.35 (19)	H13A—C13—H13B	107.4
C2—C1—Sn1	118.93 (18)	C15—C14—C19	118.2 (3)
C3—C2—C1	120.8 (3)	C15—C14—C13	120.8 (3)
C3—C2—H2	119.6	C19—C14—C13	121.0 (3)
C1—C2—H2	119.6	C16—C15—C14	120.8 (3)
C4—C3—C2	120.3 (3)	C16—C15—H15	119.6
C4—C3—H3	119.9	C14—C15—H15	119.6
C2—C3—H3	119.9	C15—C16—C17	119.9 (4)
C5—C4—C3	119.7 (3)	C15—C16—H16	120.1
C5—C4—H4	120.2	C17—C16—H16	120.1
C3—C4—H4	120.2	C18—C17—C16	119.8 (3)
C4—C5—C6	120.4 (3)	C18—C17—H17	120.1
C4—C5—H5	119.8	C16—C17—H17	120.1
C6—C5—H5	119.8	C17—C18—C19	120.7 (3)
C1—C6—C5	120.2 (3)	C17—C18—H18	119.6
C1—C6—H6	119.9	C19—C18—H18	119.6
C5—C6—H6	119.9	C18—C19—C14	120.5 (3)
C8—C7—C12	120.8 (3)	C18—C19—H19	119.7
C8—C7—S1	119.2 (3)	C14—C19—H19	119.7
C12—C7—S1	119.9 (2)

C7—S1—O1—Sn1	151.62 (14)	C13—S1—C7—C8	78.8 (3)
C13—S1—O1—Sn1	−103.37 (15)	O1—S1—C7—C12	5.1 (3)
C1—Sn1—O1—S1	143.25 (16)	C13—S1—C7—C12	−104.0 (3)
C1ⁱ—Sn1—O1—S1	−48.38 (15)	C12—C7—C8—C9	2.5 (5)
O1ⁱ—Sn1—O1—S1	−129.25 (17)	S1—C7—C8—C9	179.7 (3)
Cl1—Sn1—O1—S1	46.31 (14)	C7—C8—C9—C10	−2.3 (6)
O1—Sn1—C1—C6	45.7 (2)	C8—C9—C10—C11	0.6 (7)
O1ⁱ—Sn1—C1—C6	−40.5 (2)	C9—C10—C11—C12	0.9 (6)
Cl1ⁱ—Sn1—C1—C6	−129.0 (2)	C10—C11—C12—C7	−0.7 (6)
Cl1—Sn1—C1—C6	133.3 (2)	C8—C7—C12—C11	−1.0 (5)
C1ⁱ—Sn1—C1—C2	−174.6 (2)	S1—C7—C12—C11	−178.2 (3)
O1—Sn1—C1—C2	−131.2 (2)	O1—S1—C13—C14	−52.3 (3)
O1ⁱ—Sn1—C1—C2	142.6 (2)	C7—S1—C13—C14	55.9 (3)
Cl1ⁱ—Sn1—C1—C2	54.1 (2)	S1—C13—C14—C15	82.2 (4)
Cl1—Sn1—C1—C2	−43.6 (2)	S1—C13—C14—C19	−99.3 (3)
C6—C1—C2—C3	−1.5 (4)	C19—C14—C15—C16	−1.9 (5)
Sn1—C1—C2—C3	175.5 (2)	C13—C14—C15—C16	176.6 (3)
C1—C2—C3—C4	1.1 (5)	C14—C15—C16—C17	0.9 (6)
C2—C3—C4—C5	−0.4 (5)	C15—C16—C17—C18	0.2 (6)
C3—C4—C5—C6	0.2 (5)	C16—C17—C18—C19	−0.2 (6)
C2—C1—C6—C5	1.4 (4)	C17—C18—C19—C14	−0.9 (5)
Sn1—C1—C6—C5	−175.6 (2)	C15—C14—C19—C18	1.9 (5)
C4—C5—C6—C1	−0.7 (5)	C13—C14—C19—C18	−176.6 (3)
O1—S1—C7—C8	−172.1 (2)

Symmetry code: (i) −x+2, y, −z+1/2.

Experimental details

Crystal data
Chemical formula	[Sn(C₆H₅)₂Cl₂(C₁₃H₁₂OS)₂]
M_r	776.40
Crystal system, space group	Monoclinic, C2/c
Temperature (K)	295
a, b, c (Å)	22.7485 (19), 11.5478 (14), 16.984 (2)
β (°)	126.633 (6)
V (Å³)	3580.3 (7)
Z	4
Radiation type	Mo Kα
µ (mm⁻¹)	1.01
Crystal size (mm)	0.25 × 0.22 × 0.11

Data collection
Diffractometer	Bruker SMART APEX area-detector
Absorption correction	Multi-scan (SADABS; Bruker, 2002)
T_min, T_max	0.786, 0.897
No. of measured, independent and observed [I > 2σ(I)] reflections	9821, 3512, 3003
R_int	0.031
(sin θ/λ)_max (Å⁻¹)	0.617

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.032, 0.076, 1.03
No. of reflections	3512
No. of parameters	204
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.43, −0.37

Computer programs: SMART (Bruker, 2002), SAINT (Bruker, 2002), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997).

Acknowledgements

The author thanks the Science Foundation of Binzhou University for supporting this work (BZXYG0901 and BZXYQNLG200820).

References

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