A dimeric alkyl complex supported by an O,S,S,O-tetradentate diphenolate ligand

The title dinuclear compound, bis[μ-6,6'-di-tert-butyl-4,4′-dimethyl-2,2-(ethylenedithio)diphenolato]bis[methylaluminium(I)], [Al₂(CH₃)₂(C₂₄H₃₂O₂S₂)] or [AlMe(etbmp)]₂ [where etbmpH₂ is 6,6′-di-tert-butyl-4,4′-dimethyl-2,2- (ethylenedithio)diphenol], was obtained by reaction of trimethylaluminum with etbmpH₂, as shown by X-ray diffraction of a single crystal. The molecule possesses a crystallographic twofold axis.

Key indicators

• Single-crystal X-ray study
• T = 110 K
• Mean [sigma](C-C) = 0.002 Å
• R factor = 0.041
• wR factor = 0.109
• Data-to-parameter ratio = 22.4

checkCIF/PLATON results

No syntax errors found



Alert level C
PLAT094_ALERT_2_C Ratio of Maximum / Minimum Residual Density ....       2.09
PLAT220_ALERT_2_C Large Non-Solvent    C     Ueq(max)/Ueq(min) ...       2.83 Ratio
PLAT222_ALERT_3_C Large Non-Solvent    H     Ueq(max)/Ueq(min) ...       3.39 Ratio

   0 ALERT level A = In general: serious problem
   0 ALERT level B = Potentially serious problem
   3 ALERT level C = Check and explain
   0 ALERT level G = General alerts; check

   0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   2 ALERT type 2 Indicator that the structure model may be wrong or deficient
   1 ALERT type 3 Indicator that the structure quality may be low
   0 ALERT type 4 Improvement, methodology, query or suggestion

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Computing details

Data collection: SMART (2001); cell refinement: SMART (2001); data reduction: SAINT-Plus (1999); program(s) used to solve structure: SHELXS86 (Sheldrick, 1986); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997).

bis[µ-6,6'-di-tert-butyl-4,4'-dimethyl-2,2- (ethylenedithio)diphenolato]bis[methylaluminium(I)]

Crystal data

[Al2(CH3)2(C24H32O2S2)]4	F(000) = 1968
Mr = 917.33	Dx = 1.210 Mg m^−3
Orthorhombic, Pccn	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ab 2ac	Cell parameters from 8096 reflections
a = 10.7048 (17) Å	θ = 1.9–28.3°
b = 16.380 (3) Å	µ = 0.27 mm^−1
c = 28.722 (5) Å	T = 110 K
V = 5036.2 (14) Å^3	Irregular, colourless
Z = 4	0.60 × 0.56 × 0.30 mm

Data collection

Bruker SMART AXS diffractometer with CCD area detector	6270 independent reflections
Radiation source: fine-focus sealed tube	5520 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.033
ω–scans	θmax = 28.3°, θmin = 1.9°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −14→14
Tmin = 0.857, Tmax = 0.925	k = −21→21
50262 measured reflections	l = −38→37

Refinement

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)] = 0.041	Hydrogen site location: inferred from neighbouring sites
wR(F^2) = 0.109	H-atom parameters not refined
S = 1.07	w = 1/[σ^2(Fo^2) + (0.0611P)^2 + 2.2698P] where P = (Fo^2 + 2Fc^2)/3
6270 reflections	(Δ/σ)max = 0.001
280 parameters	Δρmax = 0.50 e Å^−3
0 restraints	Δρmin = −0.24 e Å^−3

Special details

Experimental. The values of Tmin and Tmax are 0.831245 and 1.000000 from SADABS.

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 (Ų)

	x	y	z	Uiso*/Ueq
Al	0.46275 (4)	0.35880 (3)	0.137683 (15)	0.01908 (11)
O1	0.41212 (9)	0.33448 (6)	0.19448 (3)	0.0209 (2)
O2	0.41275 (9)	0.32237 (6)	0.08252 (3)	0.0198 (2)
S1	0.58427 (3)	0.22471 (2)	0.147239 (12)	0.02002 (9)
S2	0.25115 (3)	0.43452 (2)	0.130934 (11)	0.01834 (9)
C1	0.48008 (13)	0.29053 (8)	0.22487 (5)	0.0198 (3)
C2	0.56238 (13)	0.23039 (8)	0.20833 (5)	0.0198 (3)
C3	0.62939 (14)	0.17999 (8)	0.23850 (5)	0.0231 (3)
H3	0.6851	0.1401	0.2264	0.028*
C4	0.61436 (14)	0.18830 (9)	0.28589 (5)	0.0258 (3)
C5	0.53686 (15)	0.25080 (10)	0.30215 (5)	0.0270 (3)
H5	0.5289	0.2575	0.3349	0.032*
C6	0.47059 (14)	0.30390 (9)	0.27346 (5)	0.0236 (3)
C7	0.68056 (17)	0.13231 (11)	0.31949 (6)	0.0344 (4)
H7A	0.6191	0.0981	0.3355	0.052*
H7B	0.7264	0.1650	0.3424	0.052*
H7C	0.7392	0.0975	0.3024	0.052*
C8	0.39515 (17)	0.37582 (10)	0.29311 (5)	0.0309 (4)
C9	0.3996 (2)	0.37875 (14)	0.34647 (6)	0.0518 (6)
H9A	0.4868	0.3818	0.3568	0.078*
H9B	0.3608	0.3294	0.3592	0.078*
H9C	0.3541	0.4269	0.3575	0.078*
C10	0.4525 (2)	0.45572 (11)	0.27520 (7)	0.0441 (5)
H10A	0.5396	0.4595	0.2854	0.066*
H10B	0.4052	0.5021	0.2876	0.066*
H10C	0.4491	0.4566	0.2411	0.066*
C11	0.25754 (19)	0.37165 (13)	0.27857 (7)	0.0434 (5)
H11A	0.2119	0.4173	0.2926	0.065*
H11B	0.2214	0.3199	0.2892	0.065*
H11C	0.2514	0.3751	0.2446	0.065*
C12	0.48148 (13)	0.14021 (8)	0.13055 (5)	0.0201 (3)
H12A	0.4874	0.1318	0.0965	0.024*
H12B	0.5108	0.0896	0.1459	0.024*
C13	0.35306 (13)	0.37214 (8)	0.05243 (5)	0.0183 (3)
C14	0.26576 (13)	0.42851 (8)	0.06970 (5)	0.0183 (3)
C15	0.19836 (13)	0.48007 (8)	0.04044 (5)	0.0199 (3)
H15	0.1404	0.5180	0.0531	0.024*
C16	0.21635 (13)	0.47573 (9)	−0.00732 (5)	0.0214 (3)
C17	0.30564 (14)	0.42115 (9)	−0.02419 (5)	0.0215 (3)
H17	0.3190	0.4192	−0.0569	0.026*
C18	0.37644 (13)	0.36939 (8)	0.00387 (5)	0.0194 (3)
C19	0.14317 (15)	0.52926 (10)	−0.04019 (5)	0.0272 (3)
H19A	0.0759	0.5566	−0.0231	0.041*
H19B	0.1073	0.4957	−0.0650	0.041*
H19C	0.1988	0.5703	−0.0538	0.041*
C20	0.47719 (14)	0.31349 (9)	−0.01654 (5)	0.0232 (3)
C21	0.44543 (17)	0.22378 (9)	−0.00741 (6)	0.0326 (4)
H21A	0.4377	0.2147	0.0262	0.049*
H21B	0.5120	0.1890	−0.0199	0.049*
H21C	0.3663	0.2102	−0.0227	0.049*
C22	0.60414 (15)	0.33460 (11)	0.00530 (6)	0.0333 (4)
H22A	0.6207	0.3930	0.0014	0.050*
H22B	0.6700	0.3030	−0.0101	0.050*
H22C	0.6027	0.3212	0.0385	0.050*
C23	0.4907 (2)	0.32461 (12)	−0.06914 (6)	0.0399 (4)
H23A	0.4110	0.3122	−0.0844	0.060*
H23B	0.5554	0.2876	−0.0809	0.060*
H23C	0.5145	0.3812	−0.0759	0.060*
C24	0.15310 (13)	0.34547 (8)	0.14337 (5)	0.0190 (3)
H24A	0.1851	0.2979	0.1258	0.023*
H24B	0.1586	0.3324	0.1770	0.023*
C25	0.59118 (16)	0.44265 (10)	0.13575 (6)	0.0311 (3)
H25A	0.6727	0.4180	0.1422	0.047*
H25B	0.5730	0.4844	0.1592	0.047*
H25C	0.5925	0.4678	0.1048	0.047*

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
Al	0.0213 (2)	0.0165 (2)	0.0194 (2)	−0.00149 (15)	−0.00257 (15)	0.00155 (15)
O1	0.0244 (5)	0.0205 (5)	0.0176 (5)	0.0045 (4)	−0.0035 (4)	0.0015 (4)
O2	0.0254 (5)	0.0162 (4)	0.0176 (4)	0.0020 (4)	−0.0020 (4)	0.0024 (4)
S1	0.01894 (17)	0.01926 (17)	0.02185 (17)	0.00003 (12)	0.00031 (12)	0.00026 (12)
S2	0.02299 (18)	0.01495 (17)	0.01708 (17)	−0.00109 (12)	−0.00083 (12)	0.00025 (11)
C1	0.0236 (7)	0.0158 (6)	0.0200 (7)	−0.0002 (5)	−0.0049 (5)	0.0012 (5)
C2	0.0218 (6)	0.0176 (6)	0.0199 (6)	−0.0017 (5)	−0.0027 (5)	0.0001 (5)
C3	0.0236 (7)	0.0165 (6)	0.0292 (7)	0.0009 (5)	−0.0027 (6)	0.0025 (5)
C4	0.0279 (7)	0.0217 (7)	0.0279 (7)	0.0013 (6)	−0.0063 (6)	0.0059 (6)
C5	0.0357 (8)	0.0254 (7)	0.0199 (7)	0.0027 (6)	−0.0050 (6)	0.0025 (6)
C6	0.0312 (8)	0.0192 (6)	0.0202 (7)	0.0036 (6)	−0.0051 (5)	−0.0009 (5)
C7	0.0388 (9)	0.0326 (9)	0.0317 (8)	0.0089 (7)	−0.0044 (7)	0.0118 (7)
C8	0.0462 (10)	0.0265 (8)	0.0201 (7)	0.0131 (7)	−0.0086 (6)	−0.0055 (6)
C9	0.0819 (16)	0.0511 (12)	0.0225 (8)	0.0329 (11)	−0.0067 (9)	−0.0100 (8)
C10	0.0654 (13)	0.0224 (8)	0.0445 (11)	0.0101 (8)	−0.0139 (9)	−0.0088 (7)
C11	0.0409 (10)	0.0472 (11)	0.0423 (10)	0.0175 (9)	−0.0010 (8)	−0.0168 (8)
C12	0.0224 (7)	0.0164 (6)	0.0216 (7)	0.0008 (5)	0.0004 (5)	−0.0028 (5)
C13	0.0214 (6)	0.0145 (6)	0.0189 (6)	−0.0029 (5)	−0.0019 (5)	0.0030 (5)
C14	0.0219 (6)	0.0166 (6)	0.0164 (6)	−0.0031 (5)	−0.0005 (5)	0.0015 (5)
C15	0.0209 (6)	0.0167 (6)	0.0221 (7)	−0.0004 (5)	0.0000 (5)	0.0022 (5)
C16	0.0229 (7)	0.0196 (6)	0.0216 (7)	−0.0011 (5)	−0.0026 (5)	0.0048 (5)
C17	0.0259 (7)	0.0207 (6)	0.0181 (6)	−0.0021 (5)	0.0006 (5)	0.0024 (5)
C18	0.0228 (7)	0.0156 (6)	0.0197 (6)	−0.0024 (5)	0.0007 (5)	0.0013 (5)
C19	0.0280 (7)	0.0302 (8)	0.0233 (7)	0.0040 (6)	−0.0022 (6)	0.0077 (6)
C20	0.0283 (7)	0.0196 (7)	0.0216 (7)	0.0024 (6)	0.0037 (5)	0.0006 (5)
C21	0.0399 (9)	0.0183 (7)	0.0396 (9)	−0.0003 (6)	0.0069 (7)	−0.0027 (6)
C22	0.0245 (8)	0.0331 (8)	0.0423 (9)	0.0009 (6)	0.0049 (7)	−0.0047 (7)
C23	0.0534 (11)	0.0412 (10)	0.0252 (8)	0.0171 (8)	0.0118 (8)	0.0027 (7)
C24	0.0208 (6)	0.0159 (6)	0.0202 (6)	−0.0008 (5)	−0.0006 (5)	0.0036 (5)
C25	0.0282 (8)	0.0248 (8)	0.0404 (9)	−0.0080 (6)	0.0012 (7)	−0.0015 (6)

Geometric parameters (Å, º)

Al—O1	1.7645 (11)	C11—H11C	0.9800
Al—O2	1.7755 (11)	C12—C24^i	1.505 (2)
Al—C25	1.9441 (16)	C12—H12A	0.9900
Al—S1	2.5673 (6)	C12—H12B	0.9900
Al—S2	2.5897 (6)	C13—C14	1.4042 (19)
O1—C1	1.3452 (16)	C13—C18	1.4180 (19)
O2—C13	1.3490 (16)	C14—C15	1.3928 (19)
S1—C2	1.7727 (15)	C15—C16	1.3872 (19)
S1—C12	1.8320 (14)	C15—H15	0.9500
S2—C14	1.7685 (14)	C16—C17	1.395 (2)
S2—C24	1.8321 (14)	C16—C19	1.5078 (19)
C1—C2	1.4044 (19)	C17—C18	1.3937 (19)
C1—C6	1.416 (2)	C17—H17	0.9500
C2—C3	1.3954 (19)	C18—C20	1.531 (2)
C3—C4	1.377 (2)	C19—H19A	0.9800
C3—H3	0.9500	C19—H19B	0.9800
C4—C5	1.398 (2)	C19—H19C	0.9800
C4—C7	1.508 (2)	C20—C23	1.529 (2)
C5—C6	1.392 (2)	C20—C21	1.531 (2)
C5—H5	0.9500	C20—C22	1.536 (2)
C6—C8	1.536 (2)	C21—H21A	0.9800
C7—H7A	0.9800	C21—H21B	0.9800
C7—H7B	0.9800	C21—H21C	0.9800
C7—H7C	0.9800	C22—H22A	0.9800
C8—C11	1.533 (3)	C22—H22B	0.9800
C8—C10	1.534 (3)	C22—H22C	0.9800
C8—C9	1.534 (2)	C23—H23A	0.9800
C9—H9A	0.9800	C23—H23B	0.9800
C9—H9B	0.9800	C23—H23C	0.9800
C9—H9C	0.9800	C24—C12^i	1.505 (2)
C10—H10A	0.9800	C24—H24A	0.9900
C10—H10B	0.9800	C24—H24B	0.9900
C10—H10C	0.9800	C25—H25A	0.9800
C11—H11A	0.9800	C25—H25B	0.9800
C11—H11B	0.9800	C25—H25C	0.9800
O1—Al—O2	131.03 (5)	C24^i—C12—S1	113.14 (9)
O1—Al—C25	113.77 (7)	C24^i—C12—H12A	109.0
O2—Al—C25	115.16 (7)	S1—C12—H12A	109.0
O1—Al—S1	82.16 (4)	C24^i—C12—H12B	109.0
O2—Al—S1	87.74 (4)	S1—C12—H12B	109.0
C25—Al—S1	104.42 (6)	H12A—C12—H12B	107.8
O1—Al—S2	84.76 (4)	O2—C13—C14	119.10 (12)
O2—Al—S2	80.24 (4)	O2—C13—C18	121.83 (12)
C25—Al—S2	106.15 (6)	C14—C13—C18	119.06 (12)
S1—Al—S2	149.42 (2)	C15—C14—C13	122.03 (12)
C1—O1—Al	123.69 (9)	C15—C14—S2	121.36 (11)
C13—O2—Al	120.75 (9)	C13—C14—S2	116.53 (10)
C2—S1—C12	102.67 (6)	C16—C15—C14	119.58 (13)
C2—S1—Al	89.66 (5)	C16—C15—H15	120.2
C12—S1—Al	108.30 (5)	C14—C15—H15	120.2
C14—S2—C24	101.56 (6)	C15—C16—C17	118.11 (13)
C14—S2—Al	88.31 (5)	C15—C16—C19	121.15 (13)
C24—S2—Al	96.04 (5)	C17—C16—C19	120.74 (13)
O1—C1—C2	119.67 (12)	C18—C17—C16	124.16 (13)
O1—C1—C6	121.19 (12)	C18—C17—H17	117.9
C2—C1—C6	119.13 (12)	C16—C17—H17	117.9
C3—C2—C1	121.83 (13)	C17—C18—C13	116.96 (13)
C3—C2—S1	121.05 (11)	C17—C18—C20	121.70 (12)
C1—C2—S1	117.04 (10)	C13—C18—C20	121.32 (12)
C4—C3—C2	119.68 (14)	C16—C19—H19A	109.5
C4—C3—H3	120.2	C16—C19—H19B	109.5
C2—C3—H3	120.2	H19A—C19—H19B	109.5
C3—C4—C5	118.15 (13)	C16—C19—H19C	109.5
C3—C4—C7	121.16 (14)	H19A—C19—H19C	109.5
C5—C4—C7	120.69 (14)	H19B—C19—H19C	109.5
C6—C5—C4	124.21 (14)	C23—C20—C21	107.74 (13)
C6—C5—H5	117.9	C23—C20—C18	111.95 (12)
C4—C5—H5	117.9	C21—C20—C18	110.61 (12)
C5—C6—C1	116.74 (13)	C23—C20—C22	107.03 (14)
C5—C6—C8	121.99 (13)	C21—C20—C22	110.04 (13)
C1—C6—C8	121.22 (13)	C18—C20—C22	109.40 (12)
C4—C7—H7A	109.5	C20—C21—H21A	109.5
C4—C7—H7B	109.5	C20—C21—H21B	109.5
H7A—C7—H7B	109.5	H21A—C21—H21B	109.5
C4—C7—H7C	109.5	C20—C21—H21C	109.5
H7A—C7—H7C	109.5	H21A—C21—H21C	109.5
H7B—C7—H7C	109.5	H21B—C21—H21C	109.5
C11—C8—C10	109.33 (15)	C20—C22—H22A	109.5
C11—C8—C9	107.68 (16)	C20—C22—H22B	109.5
C10—C8—C9	107.20 (16)	H22A—C22—H22B	109.5
C11—C8—C6	111.79 (13)	C20—C22—H22C	109.5
C10—C8—C6	108.72 (15)	H22A—C22—H22C	109.5
C9—C8—C6	112.00 (13)	H22B—C22—H22C	109.5
C8—C9—H9A	109.5	C20—C23—H23A	109.5
C8—C9—H9B	109.5	C20—C23—H23B	109.5
H9A—C9—H9B	109.5	H23A—C23—H23B	109.5
C8—C9—H9C	109.5	C20—C23—H23C	109.5
H9A—C9—H9C	109.5	H23A—C23—H23C	109.5
H9B—C9—H9C	109.5	H23B—C23—H23C	109.5
C8—C10—H10A	109.5	C12^i—C24—S2	112.12 (9)
C8—C10—H10B	109.5	C12^i—C24—H24A	109.2
H10A—C10—H10B	109.5	S2—C24—H24A	109.2
C8—C10—H10C	109.5	C12^i—C24—H24B	109.2
H10A—C10—H10C	109.5	S2—C24—H24B	109.2
H10B—C10—H10C	109.5	H24A—C24—H24B	107.9
C8—C11—H11A	109.5	Al—C25—H25A	109.5
C8—C11—H11B	109.5	Al—C25—H25B	109.5
H11A—C11—H11B	109.5	H25A—C25—H25B	109.5
C8—C11—H11C	109.5	Al—C25—H25C	109.5
H11A—C11—H11C	109.5	H25A—C25—H25C	109.5
H11B—C11—H11C	109.5	H25B—C25—H25C	109.5
O2—Al—O1—C1	108.40 (11)	O1—C1—C6—C5	174.81 (13)
C25—Al—O1—C1	−74.03 (12)	C2—C1—C6—C5	−5.4 (2)
S1—Al—O1—C1	28.33 (10)	O1—C1—C6—C8	−7.7 (2)
S2—Al—O1—C1	−179.38 (10)	C2—C1—C6—C8	172.12 (14)
O1—Al—O2—C13	112.45 (10)	C5—C6—C8—C11	−122.78 (17)
C25—Al—O2—C13	−65.09 (12)	C1—C6—C8—C11	59.8 (2)
S1—Al—O2—C13	−169.97 (10)	C5—C6—C8—C10	116.43 (17)
S2—Al—O2—C13	38.27 (9)	C1—C6—C8—C10	−60.94 (19)
O1—Al—S1—C2	−17.52 (6)	C5—C6—C8—C9	−1.8 (2)
O2—Al—S1—C2	−149.48 (6)	C1—C6—C8—C9	−179.21 (17)
C25—Al—S1—C2	95.10 (7)	C2—S1—C12—C24^i	58.93 (11)
S2—Al—S1—C2	−83.06 (6)	Al—S1—C12—C24^i	−34.97 (11)
O1—Al—S1—C12	85.72 (6)	Al—O2—C13—C14	−38.93 (16)
O2—Al—S1—C12	−46.24 (6)	Al—O2—C13—C18	140.77 (11)
C25—Al—S1—C12	−161.66 (7)	O2—C13—C14—C15	−178.17 (12)
S2—Al—S1—C12	20.18 (7)	C18—C13—C14—C15	2.1 (2)
O1—Al—S2—C14	−159.34 (6)	O2—C13—C14—S2	4.92 (17)
O2—Al—S2—C14	−26.13 (5)	C18—C13—C14—S2	−174.78 (10)
C25—Al—S2—C14	87.41 (7)	C24—S2—C14—C15	103.78 (12)
S1—Al—S2—C14	−94.44 (6)	Al—S2—C14—C15	−160.40 (11)
O1—Al—S2—C24	−57.89 (6)	C24—S2—C14—C13	−79.29 (11)
O2—Al—S2—C24	75.32 (6)	Al—S2—C14—C13	16.53 (10)
C25—Al—S2—C24	−171.15 (7)	C13—C14—C15—C16	0.6 (2)
S1—Al—S2—C24	7.00 (6)	S2—C14—C15—C16	177.32 (11)
Al—O1—C1—C2	−30.70 (17)	C14—C15—C16—C17	−2.2 (2)
Al—O1—C1—C6	149.11 (11)	C14—C15—C16—C19	178.69 (13)
O1—C1—C2—C3	−176.18 (13)	C15—C16—C17—C18	1.3 (2)
C6—C1—C2—C3	4.0 (2)	C19—C16—C17—C18	−179.61 (14)
O1—C1—C2—S1	7.16 (18)	C16—C17—C18—C13	1.3 (2)
C6—C1—C2—S1	−172.65 (11)	C16—C17—C18—C20	−177.25 (13)
C12—S1—C2—C3	83.90 (13)	O2—C13—C18—C17	177.34 (12)
Al—S1—C2—C3	−167.41 (11)	C14—C13—C18—C17	−2.96 (19)
C12—S1—C2—C1	−99.41 (12)	O2—C13—C18—C20	−4.1 (2)
Al—S1—C2—C1	9.29 (11)	C14—C13—C18—C20	175.61 (12)
C1—C2—C3—C4	0.6 (2)	C17—C18—C20—C23	1.9 (2)
S1—C2—C3—C4	177.17 (11)	C13—C18—C20—C23	−176.60 (14)
C2—C3—C4—C5	−3.6 (2)	C17—C18—C20—C21	−118.27 (15)
C2—C3—C4—C7	177.09 (14)	C13—C18—C20—C21	63.23 (18)
C3—C4—C5—C6	2.0 (2)	C17—C18—C20—C22	120.37 (15)
C7—C4—C5—C6	−178.64 (16)	C13—C18—C20—C22	−58.14 (17)
C4—C5—C6—C1	2.5 (2)	C14—S2—C24—C12^i	−75.62 (11)
C4—C5—C6—C8	−174.97 (16)	Al—S2—C24—C12^i	−165.12 (9)

Symmetry code: (i) −x+1/2, −y+1/2, z.