5,10-Di­hydro­indeno­[2,1-a]indene

The title compound, C₁₆H₁₂, crystallizes with four half mol­ecules in the asymmetric unit, each of which is located on a crystallographic centre of inversion. The mol­ecules are essentially planar. The crystal studied was a non-merohedral twin.

Key indicators

• Single-crystal X-ray study
• T = 193 K
• Mean [sigma](C-C) = 0.004 Å
• R factor = 0.056
• wR factor = 0.141
• Data-to-parameter ratio = 49.8

checkCIF/PLATON results

No syntax errors found



Alert level B
PLAT230_ALERT_2_B Hirshfeld Test Diff for    C2D      --C3D      .       11.0 s.u.

Alert level C
PLAT340_ALERT_3_C Low Bond Precision on  C-C Bonds ...............    0.00427 Ang.
PLAT906_ALERT_3_C Large K Value in the Analysis of Variance ......      2.323 Check
PLAT911_ALERT_3_C Missing FCF Refl Between Thmin & STh/L=    0.600          9 Report

Alert level G
PLAT870_ALERT_4_G ALERTS Related to Twinning Effects Suppressed ..          ! Info
PLAT910_ALERT_3_G Missing # of FCF Reflection(s) Below Theta(Min).          2 Note
PLAT912_ALERT_4_G Missing # of FCF Reflections Above STh/L=  0.600         87 Note
PLAT931_ALERT_5_G CIFcalcFCF  Twin Law ( 0 0 1)         Est.d BASF       0.49 Check
PLAT931_ALERT_5_G CIFcalcFCF  Twin Law ( 1 1-1)         Est.d BASF       0.29 Check

   0 ALERT level A = Most likely a serious problem - resolve or explain
   1 ALERT level B = A potentially serious problem, consider carefully
   3 ALERT level C = Check. Ensure it is not caused by an omission or oversight
   5 ALERT level G = General information/check it is not something unexpected

   0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   1 ALERT type 2 Indicator that the structure model may be wrong or deficient
   4 ALERT type 3 Indicator that the structure quality may be low
   2 ALERT type 4 Improvement, methodology, query or suggestion
   2 ALERT type 5 Informative message, check

---

Computing details

Data collection: X-AREA (Stoe & Cie, 1996); cell refinement: X-AREA (Stoe & Cie, 1996); data reduction: X-RED (Stoe & Cie, 1996); program(s) used to solve structure: SHELXT2014 (Sheldrick, 2015a); program(s) used to refine structure: SHELXL2018 (Sheldrick, 2015b); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL2018 (Sheldrick, 2015b).

5,10-Dihydroindeno[2,1-a]indene

Crystal data

C16H12	Z = 4
Mr = 204.26	F(000) = 432
Triclinic, P1	Dx = 1.255 Mg m^−3
a = 7.5009 (9) Å	Mo Kα radiation, λ = 0.71073 Å
b = 7.6819 (9) Å	Cell parameters from 2411 reflections
c = 19.387 (3) Å	θ = 2.8–28.0°
α = 99.733 (11)°	µ = 0.07 mm^−1
β = 100.641 (11)°	T = 193 K
γ = 90.523 (9)°	Plate, colourless
V = 1081.2 (2) Å^3	0.22 × 0.15 × 0.04 mm

Data collection

Stoe IPDS 2T diffractometer	7500 reflections with I > 2σ(I)
Radiation source: sealed X-ray tube, 12 x 0.4 mm long-fine focus	θmax = 28.4°, θmin = 2.7°
Detector resolution: 6.67 pixels mm^-1	h = −9→9
rotation method scans	k = −10→10
14443 measured reflections	l = −25→25
14443 independent reflections

Refinement

Refinement on F^2	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F^2 > 2σ(F^2)] = 0.056	H-atom parameters constrained
wR(F^2) = 0.141	w = 1/[σ^2(Fo^2) + (0.0513P)^2 + 0.1143P] where P = (Fo^2 + 2Fc^2)/3
S = 1.03	(Δ/σ)max < 0.001
14443 reflections	Δρmax = 0.29 e Å^−3
290 parameters	Δρmin = −0.21 e Å^−3
0 restraints

Special details

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. Refined as a 2-component twin. BASF 0.40850 Twin law for transforming hkl(1) to hkl(2): -1.00006 0.00023 0.00003 0.00016 -1.00020 0.00001 0.95946 0.87001 1.00038

Hydrogen atoms attached to carbons were placed at calculated positions and were refined in the riding-model approximation with isotropic displacement parameters set to 1.2 U_eq(C).

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Ų)

	x	y	z	Uiso*/Ueq
C1A	0.6265 (4)	0.1349 (3)	0.58366 (16)	0.0420 (7)
H1A	0.570270	0.239199	0.607100	0.050*
H1B	0.758394	0.160278	0.588948	0.050*
C2A	0.5377 (3)	0.0821 (3)	0.50682 (15)	0.0379 (7)
C3A	0.5094 (3)	0.1575 (3)	0.44194 (16)	0.0371 (7)
C4A	0.5622 (3)	0.3197 (3)	0.42737 (17)	0.0424 (7)
H4A	0.627703	0.406985	0.464147	0.051*
C5A	0.5171 (4)	0.3509 (4)	0.35798 (18)	0.0463 (8)
H5A	0.553328	0.460341	0.347082	0.056*
C6A	0.4206 (4)	0.2254 (4)	0.30472 (18)	0.0475 (8)
H6A	0.390593	0.250000	0.257642	0.057*
C7A	0.3663 (4)	0.0633 (4)	0.31857 (17)	0.0461 (8)
H7A	0.299603	−0.022537	0.281531	0.055*
C8A	0.4111 (3)	0.0299 (3)	0.38696 (16)	0.0396 (7)
C1B	0.9607 (4)	0.6291 (3)	0.58564 (17)	0.0485 (8)
H1C	0.834972	0.652170	0.592501	0.058*
H1D	1.040849	0.733646	0.609137	0.058*
C2B	0.9702 (4)	0.5806 (3)	0.50825 (17)	0.0428 (7)
C3B	0.9306 (3)	0.6610 (3)	0.44363 (17)	0.0416 (7)
C4B	0.8648 (4)	0.8222 (3)	0.43136 (18)	0.0472 (8)
H4B	0.837765	0.907055	0.469307	0.057*
C5B	0.8391 (4)	0.8579 (4)	0.36300 (19)	0.0512 (8)
H5B	0.792298	0.967956	0.353938	0.061*
C6B	0.8799 (4)	0.7372 (4)	0.30744 (19)	0.0523 (8)
H6B	0.862114	0.765677	0.260901	0.063*
C7B	0.9472 (4)	0.5735 (4)	0.3191 (2)	0.0537 (9)
H7B	0.974921	0.489898	0.280873	0.064*
C8B	0.9724 (3)	0.5359 (3)	0.38743 (18)	0.0439 (7)
C1C	0.6484 (4)	0.4528 (4)	0.08155 (17)	0.0491 (8)
H1E	0.760177	0.527069	0.102405	0.059*
H1F	0.670975	0.328768	0.087230	0.059*
C2C	0.5827 (3)	0.4677 (3)	0.00581 (17)	0.0422 (7)
C3C	0.6498 (4)	0.4309 (3)	−0.06130 (17)	0.0422 (7)
C4C	0.8104 (4)	0.3624 (3)	−0.07899 (18)	0.0506 (8)
H4C	0.903217	0.330126	−0.043541	0.061*
C5C	0.8316 (4)	0.3425 (3)	−0.14959 (19)	0.0530 (8)
H5C	0.939557	0.295384	−0.162728	0.064*
C6C	0.6969 (4)	0.3906 (4)	−0.20061 (19)	0.0537 (8)
H6C	0.713696	0.377195	−0.248581	0.064*
C7C	0.5370 (4)	0.4585 (4)	−0.18306 (19)	0.0512 (8)
H7C	0.445029	0.491165	−0.218706	0.061*
C8C	0.5134 (4)	0.4776 (3)	−0.11433 (17)	0.0429 (7)
C1D	0.1447 (4)	0.1273 (4)	0.08064 (18)	0.0545 (8)
H1G	0.168542	0.255730	0.083898	0.065*
H1H	0.255170	0.074407	0.103547	0.065*
C2D	0.0818 (4)	0.0383 (3)	0.00570 (18)	0.0461 (8)
C3D	0.1529 (4)	0.0084 (3)	−0.06117 (18)	0.0451 (7)
C4D	0.3153 (4)	0.0594 (3)	−0.07869 (19)	0.0525 (8)
H4D	0.406367	0.127811	−0.043834	0.063*
C5D	0.3409 (4)	0.0080 (4)	−0.1484 (2)	0.0555 (8)
H5D	0.450338	0.041999	−0.161536	0.067*
C6D	0.2082 (5)	−0.0922 (4)	−0.1985 (2)	0.0569 (9)
H6D	0.227975	−0.128483	−0.245749	0.068*
C7D	0.0464 (4)	−0.1404 (4)	−0.18077 (19)	0.0538 (8)
H7D	−0.044961	−0.208078	−0.215738	0.065*
C8D	0.0193 (4)	−0.0903 (3)	−0.11304 (19)	0.0467 (8)

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
C1A	0.0377 (15)	0.0378 (14)	0.0459 (19)	−0.0018 (11)	0.0034 (13)	−0.0003 (12)
C2A	0.0280 (14)	0.0375 (14)	0.046 (2)	0.0033 (11)	0.0065 (13)	0.0017 (13)
C3A	0.0260 (13)	0.0400 (14)	0.045 (2)	0.0029 (10)	0.0086 (13)	0.0063 (13)
C4A	0.0326 (14)	0.0404 (15)	0.052 (2)	−0.0012 (11)	0.0064 (14)	0.0024 (14)
C5A	0.0391 (16)	0.0437 (16)	0.059 (2)	0.0007 (12)	0.0120 (15)	0.0131 (15)
C6A	0.0438 (17)	0.0529 (17)	0.046 (2)	0.0044 (13)	0.0081 (15)	0.0107 (15)
C7A	0.0433 (17)	0.0443 (16)	0.047 (2)	0.0017 (12)	0.0047 (15)	0.0003 (14)
C8A	0.0309 (14)	0.0378 (14)	0.050 (2)	0.0030 (11)	0.0107 (14)	0.0028 (13)
C1B	0.0444 (17)	0.0417 (15)	0.058 (2)	0.0015 (12)	0.0159 (15)	−0.0037 (13)
C2B	0.0300 (13)	0.0409 (14)	0.055 (2)	−0.0026 (10)	0.0113 (13)	−0.0038 (14)
C3B	0.0285 (14)	0.0421 (15)	0.054 (2)	−0.0032 (11)	0.0119 (14)	0.0043 (14)
C4B	0.0367 (15)	0.0449 (16)	0.060 (2)	0.0036 (12)	0.0139 (15)	0.0048 (15)
C5B	0.0392 (16)	0.0478 (17)	0.068 (3)	0.0023 (12)	0.0127 (16)	0.0111 (16)
C6B	0.0483 (18)	0.0549 (18)	0.055 (2)	−0.0045 (14)	0.0114 (16)	0.0123 (16)
C7B	0.0486 (18)	0.0484 (18)	0.062 (3)	−0.0057 (14)	0.0153 (17)	−0.0023 (16)
C8B	0.0325 (14)	0.0396 (15)	0.058 (2)	−0.0045 (11)	0.0101 (14)	0.0017 (14)
C1C	0.0473 (17)	0.0473 (16)	0.051 (2)	0.0010 (13)	−0.0026 (15)	0.0165 (14)
C2C	0.0426 (15)	0.0292 (13)	0.051 (2)	−0.0031 (11)	−0.0029 (15)	0.0103 (13)
C3C	0.0506 (17)	0.0307 (14)	0.046 (2)	−0.0035 (12)	0.0108 (15)	0.0083 (13)
C4C	0.0574 (19)	0.0395 (15)	0.055 (2)	0.0042 (13)	0.0067 (17)	0.0138 (15)
C5C	0.057 (2)	0.0428 (16)	0.060 (2)	0.0033 (13)	0.0187 (18)	0.0043 (15)
C6C	0.066 (2)	0.0473 (17)	0.048 (2)	−0.0080 (15)	0.0156 (18)	0.0038 (15)
C7C	0.0547 (19)	0.0494 (17)	0.047 (2)	−0.0093 (14)	0.0039 (16)	0.0083 (15)
C8C	0.0464 (17)	0.0334 (14)	0.047 (2)	−0.0053 (12)	0.0060 (15)	0.0067 (13)
C1D	0.0495 (18)	0.0459 (16)	0.062 (2)	−0.0013 (13)	−0.0032 (16)	0.0057 (15)
C2D	0.0440 (16)	0.0286 (14)	0.059 (2)	0.0023 (11)	−0.0074 (16)	0.0065 (14)
C3D	0.0525 (18)	0.0321 (14)	0.053 (2)	0.0110 (12)	0.0115 (16)	0.0130 (13)
C4D	0.0554 (19)	0.0352 (15)	0.063 (3)	−0.0011 (13)	0.0002 (17)	0.0086 (15)
C5D	0.055 (2)	0.0489 (17)	0.069 (3)	0.0053 (14)	0.0181 (18)	0.0218 (17)
C6D	0.068 (2)	0.0544 (18)	0.051 (2)	0.0175 (16)	0.0114 (19)	0.0142 (16)
C7D	0.0508 (19)	0.0484 (17)	0.058 (2)	0.0094 (14)	−0.0006 (17)	0.0090 (16)
C8D	0.0456 (17)	0.0354 (15)	0.058 (2)	0.0071 (12)	0.0029 (16)	0.0117 (14)

Geometric parameters (Å, º)

C1A—C2A	1.500 (4)	C1C—C2C	1.484 (4)
C1A—C8A^i	1.518 (4)	C1C—C8C^iii	1.531 (4)
C1A—H1A	0.9900	C1C—H1E	0.9900
C1A—H1B	0.9900	C1C—H1F	0.9900
C2A—C2A^i	1.341 (4)	C2C—C2C^iii	1.335 (5)
C2A—C3A	1.453 (4)	C2C—C3C	1.465 (4)
C3A—C4A	1.393 (3)	C3C—C4C	1.396 (4)
C3A—C8A	1.408 (4)	C3C—C8C	1.406 (4)
C4A—C5A	1.387 (4)	C4C—C5C	1.390 (4)
C4A—H4A	0.9500	C4C—H4C	0.9500
C5A—C6A	1.376 (4)	C5C—C6C	1.377 (4)
C5A—H5A	0.9500	C5C—H5C	0.9500
C6A—C7A	1.390 (4)	C6C—C7C	1.388 (4)
C6A—H6A	0.9500	C6C—H6C	0.9500
C7A—C8A	1.374 (4)	C7C—C8C	1.360 (4)
C7A—H7A	0.9500	C7C—H7C	0.9500
C1B—C2B	1.499 (4)	C1D—C2D	1.485 (4)
C1B—C8B^ii	1.506 (4)	C1D—C8D^iv	1.526 (4)
C1B—H1C	0.9900	C1D—H1G	0.9900
C1B—H1D	0.9900	C1D—H1H	0.9900
C2B—C2B^ii	1.329 (5)	C2D—C2D^iv	1.321 (5)
C2B—C3B	1.472 (4)	C2D—C3D	1.475 (4)
C3B—C4B	1.379 (4)	C3D—C4D	1.393 (4)
C3B—C8B	1.410 (4)	C3D—C8D	1.395 (4)
C4B—C5B	1.378 (4)	C4D—C5D	1.392 (4)
C4B—H4B	0.9500	C4D—H4D	0.9500
C5B—C6B	1.379 (4)	C5D—C6D	1.380 (4)
C5B—H5B	0.9500	C5D—H5D	0.9500
C6B—C7B	1.397 (4)	C6D—C7D	1.385 (4)
C6B—H6B	0.9500	C6D—H6D	0.9500
C7B—C8B	1.384 (4)	C7D—C8D	1.357 (4)
C7B—H7B	0.9500	C7D—H7D	0.9500
C2A—C1A—C8A^i	101.2 (2)	C2C—C1C—C8C^iii	100.7 (2)
C2A—C1A—H1A	111.5	C2C—C1C—H1E	111.6
C8A^i—C1A—H1A	111.5	C8C^iii—C1C—H1E	111.6
C2A—C1A—H1B	111.5	C2C—C1C—H1F	111.6
C8A^i—C1A—H1B	111.5	C8C^iii—C1C—H1F	111.6
H1A—C1A—H1B	109.3	H1E—C1C—H1F	109.4
C2A^i—C2A—C3A	109.8 (3)	C2C^iii—C2C—C3C	109.6 (3)
C2A^i—C2A—C1A	111.8 (3)	C2C^iii—C2C—C1C	113.0 (4)
C3A—C2A—C1A	138.4 (2)	C3C—C2C—C1C	137.4 (2)
C4A—C3A—C8A	120.1 (3)	C4C—C3C—C8C	120.1 (3)
C4A—C3A—C2A	132.5 (3)	C4C—C3C—C2C	133.1 (3)
C8A—C3A—C2A	107.5 (2)	C8C—C3C—C2C	106.8 (2)
C5A—C4A—C3A	118.5 (3)	C5C—C4C—C3C	118.6 (3)
C5A—C4A—H4A	120.7	C5C—C4C—H4C	120.7
C3A—C4A—H4A	120.7	C3C—C4C—H4C	120.7
C6A—C5A—C4A	120.9 (3)	C6C—C5C—C4C	120.4 (3)
C6A—C5A—H5A	119.6	C6C—C5C—H5C	119.8
C4A—C5A—H5A	119.6	C4C—C5C—H5C	119.8
C5A—C6A—C7A	121.2 (3)	C5C—C6C—C7C	121.1 (3)
C5A—C6A—H6A	119.4	C5C—C6C—H6C	119.5
C7A—C6A—H6A	119.4	C7C—C6C—H6C	119.5
C8A—C7A—C6A	118.6 (3)	C8C—C7C—C6C	119.3 (3)
C8A—C7A—H7A	120.7	C8C—C7C—H7C	120.3
C6A—C7A—H7A	120.7	C6C—C7C—H7C	120.3
C7A—C8A—C3A	120.7 (3)	C7C—C8C—C3C	120.5 (3)
C7A—C8A—C1A^i	129.7 (3)	C7C—C8C—C1C^iii	129.5 (3)
C3A—C8A—C1A^i	109.6 (3)	C3C—C8C—C1C^iii	109.9 (3)
C2B—C1B—C8B^ii	101.0 (2)	C2D—C1D—C8D^iv	100.7 (2)
C2B—C1B—H1C	111.6	C2D—C1D—H1G	111.6
C8B^ii—C1B—H1C	111.6	C8D^iv—C1D—H1G	111.6
C2B—C1B—H1D	111.6	C2D—C1D—H1H	111.6
C8B^ii—C1B—H1D	111.6	C8D^iv—C1D—H1H	111.6
H1C—C1B—H1D	109.4	H1G—C1D—H1H	109.4
C2B^ii—C2B—C3B	109.3 (4)	C2D^iv—C2D—C3D	109.2 (4)
C2B^ii—C2B—C1B	112.7 (4)	C2D^iv—C2D—C1D	113.2 (4)
C3B—C2B—C1B	138.0 (2)	C3D—C2D—C1D	137.5 (2)
C4B—C3B—C8B	120.6 (3)	C4D—C3D—C8D	120.2 (3)
C4B—C3B—C2B	132.7 (3)	C4D—C3D—C2D	132.9 (3)
C8B—C3B—C2B	106.7 (2)	C8D—C3D—C2D	106.9 (3)
C5B—C4B—C3B	118.7 (3)	C5D—C4D—C3D	118.5 (3)
C5B—C4B—H4B	120.7	C5D—C4D—H4D	120.8
C3B—C4B—H4B	120.7	C3D—C4D—H4D	120.8
C4B—C5B—C6B	121.5 (3)	C6D—C5D—C4D	120.3 (3)
C4B—C5B—H5B	119.3	C6D—C5D—H5D	119.8
C6B—C5B—H5B	119.3	C4D—C5D—H5D	119.8
C5B—C6B—C7B	120.5 (3)	C5D—C6D—C7D	120.7 (3)
C5B—C6B—H6B	119.7	C5D—C6D—H6D	119.6
C7B—C6B—H6B	119.7	C7D—C6D—H6D	119.6
C8B—C7B—C6B	118.5 (3)	C8D—C7D—C6D	119.6 (3)
C8B—C7B—H7B	120.7	C8D—C7D—H7D	120.2
C6B—C7B—H7B	120.7	C6D—C7D—H7D	120.2
C7B—C8B—C3B	120.2 (3)	C7D—C8D—C3D	120.7 (3)
C7B—C8B—C1B^ii	129.5 (3)	C7D—C8D—C1D^iv	129.4 (3)
C3B—C8B—C1B^ii	110.3 (3)	C3D—C8D—C1D^iv	109.9 (3)
C8A^i—C1A—C2A—C2A^i	−0.1 (3)	C8C^iii—C1C—C2C—C2C^iii	0.0 (4)
C8A^i—C1A—C2A—C3A	−179.9 (3)	C8C^iii—C1C—C2C—C3C	−180.0 (3)
C2A^i—C2A—C3A—C4A	−178.8 (3)	C2C^iii—C2C—C3C—C4C	−179.4 (3)
C1A—C2A—C3A—C4A	1.0 (5)	C1C—C2C—C3C—C4C	0.6 (5)
C2A^i—C2A—C3A—C8A	0.1 (3)	C2C^iii—C2C—C3C—C8C	0.0 (3)
C1A—C2A—C3A—C8A	179.9 (3)	C1C—C2C—C3C—C8C	−180.0 (3)
C8A—C3A—C4A—C5A	−0.5 (4)	C8C—C3C—C4C—C5C	0.2 (4)
C2A—C3A—C4A—C5A	178.3 (3)	C2C—C3C—C4C—C5C	179.5 (3)
C3A—C4A—C5A—C6A	0.7 (4)	C3C—C4C—C5C—C6C	0.4 (4)
C4A—C5A—C6A—C7A	−0.4 (4)	C4C—C5C—C6C—C7C	−0.5 (4)
C5A—C6A—C7A—C8A	−0.1 (4)	C5C—C6C—C7C—C8C	0.0 (4)
C6A—C7A—C8A—C3A	0.3 (4)	C6C—C7C—C8C—C3C	0.6 (4)
C6A—C7A—C8A—C1A^i	−178.5 (2)	C6C—C7C—C8C—C1C^iii	−179.6 (2)
C4A—C3A—C8A—C7A	0.0 (4)	C4C—C3C—C8C—C7C	−0.7 (4)
C2A—C3A—C8A—C7A	−179.1 (2)	C2C—C3C—C8C—C7C	179.8 (2)
C4A—C3A—C8A—C1A^i	179.0 (2)	C4C—C3C—C8C—C1C^iii	179.5 (2)
C2A—C3A—C8A—C1A^i	−0.1 (3)	C2C—C3C—C8C—C1C^iii	0.0 (3)
C8B^ii—C1B—C2B—C2B^ii	0.2 (4)	C8D^iv—C1D—C2D—C2D^iv	−0.7 (4)
C8B^ii—C1B—C2B—C3B	179.7 (3)	C8D^iv—C1D—C2D—C3D	−179.7 (3)
C2B^ii—C2B—C3B—C4B	179.1 (3)	C2D^iv—C2D—C3D—C4D	179.8 (3)
C1B—C2B—C3B—C4B	−0.4 (5)	C1D—C2D—C3D—C4D	−1.2 (5)
C2B^ii—C2B—C3B—C8B	−0.4 (4)	C2D^iv—C2D—C3D—C8D	0.4 (4)
C1B—C2B—C3B—C8B	−179.9 (3)	C1D—C2D—C3D—C8D	179.4 (3)
C8B—C3B—C4B—C5B	0.6 (4)	C8D—C3D—C4D—C5D	−0.8 (4)
C2B—C3B—C4B—C5B	−178.9 (3)	C2D—C3D—C4D—C5D	179.9 (3)
C3B—C4B—C5B—C6B	−0.9 (4)	C3D—C4D—C5D—C6D	−0.4 (4)
C4B—C5B—C6B—C7B	0.7 (4)	C4D—C5D—C6D—C7D	1.2 (4)
C5B—C6B—C7B—C8B	−0.3 (4)	C5D—C6D—C7D—C8D	−0.8 (4)
C6B—C7B—C8B—C3B	0.0 (4)	C6D—C7D—C8D—C3D	−0.3 (4)
C6B—C7B—C8B—C1B^ii	178.9 (3)	C6D—C7D—C8D—C1D^iv	−179.6 (3)
C4B—C3B—C8B—C7B	−0.2 (4)	C4D—C3D—C8D—C7D	1.1 (4)
C2B—C3B—C8B—C7B	179.4 (2)	C2D—C3D—C8D—C7D	−179.4 (2)
C4B—C3B—C8B—C1B^ii	−179.3 (2)	C4D—C3D—C8D—C1D^iv	−179.5 (2)
C2B—C3B—C8B—C1B^ii	0.3 (3)	C2D—C3D—C8D—C1D^iv	0.0 (3)

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