Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S0108270100006508/qa0294sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S0108270100006508/qa0294Isup2.hkl |
CCDC reference: 146102
Data collection: KappaCCD Server Software (Nonius, 1997); cell refinement: DENZO-SMN (Otwinowski & Minor, 1997); data reduction: DENZO-SMN; program(s) used to solve structure: SHELXTL (Sheldrick, 1997); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
C44H32O2P2 | F(000) = 684 |
Mr = 654.64 | Dx = 1.279 Mg m−3 |
Monoclinic, P21 | Mo Kα radiation, λ = 0.71073 Å |
a = 9.0719 (2) Å | Cell parameters from 16714 reflections |
b = 18.9903 (8) Å | θ = 2.6–32.0° |
c = 10.1528 (3) Å | µ = 0.17 mm−1 |
β = 103.620 (2)° | T = 150 K |
V = 1699.92 (10) Å3 | Block cut from neeedle, colourless |
Z = 2 | 0.34 × 0.30 × 0.20 mm |
Nonius KappaCDD diffractometer | 10057 independent reflections |
Radiation source: fine-focus sealed tube | 7746 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.032 |
φ and ω scans with κ offsets | θmax = 32.0°, θmin = 2.6° |
Absorption correction: multi-scan (DENZO-SMN; Otwinowski & Minor, 1997) | h = −13→13 |
Tmin = 0.946, Tmax = 0.968 | k = −25→28 |
16714 measured reflections | l = −15→15 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.052 | H-atom parameters constrained |
wR(F2) = 0.099 | w = 1/[σ2(Fo2) + (0.0192P)2 + 0.3419P] where P = (Fo2 + 2Fc2)/3 |
S = 1.02 | (Δ/σ)max < 0.001 |
10057 reflections | Δρmax = 0.32 e Å−3 |
434 parameters | Δρmin = −0.37 e Å−3 |
1 restraint | Absolute structure: Flack (1983); 4058 Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: 0.00 (6) |
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. |
x | y | z | Uiso*/Ueq | ||
P1 | 0.38718 (6) | 0.11271 (3) | 0.09531 (5) | 0.02064 (11) | |
P2 | 0.46092 (6) | 0.25701 (3) | 0.43790 (5) | 0.02034 (11) | |
O1 | 0.39653 (15) | 0.08055 (9) | 0.23009 (14) | 0.0262 (3) | |
O2 | 0.39496 (15) | 0.28703 (8) | 0.30197 (13) | 0.0254 (3) | |
C1 | 0.6220 (2) | 0.20572 (11) | 0.21129 (18) | 0.0187 (4) | |
C2 | 0.5082 (2) | 0.18876 (12) | 0.09794 (19) | 0.0196 (4) | |
C3 | 0.4856 (2) | 0.23184 (12) | −0.01941 (19) | 0.0218 (4) | |
H3A | 0.4102 | 0.2192 | −0.0977 | 0.026* | |
C4 | 0.5700 (2) | 0.29108 (12) | −0.0221 (2) | 0.0238 (4) | |
H4A | 0.5499 | 0.3201 | −0.1006 | 0.029* | |
C5 | 0.6872 (2) | 0.30965 (12) | 0.0912 (2) | 0.0225 (4) | |
C6 | 0.7771 (2) | 0.37096 (13) | 0.0916 (2) | 0.0284 (5) | |
H6A | 0.7557 | 0.4018 | 0.0157 | 0.034* | |
C7 | 0.8946 (3) | 0.38616 (14) | 0.2005 (3) | 0.0382 (6) | |
H7A | 0.9540 | 0.4273 | 0.1997 | 0.046* | |
C8 | 0.9271 (3) | 0.34084 (15) | 0.3134 (2) | 0.0375 (6) | |
H8A | 1.0106 | 0.3507 | 0.3872 | 0.045* | |
C9 | 0.8398 (2) | 0.28302 (13) | 0.3177 (2) | 0.0290 (5) | |
H9A | 0.8618 | 0.2537 | 0.3957 | 0.035* | |
C10 | 0.7166 (2) | 0.26566 (12) | 0.20790 (18) | 0.0211 (4) | |
C11 | 0.6484 (2) | 0.16290 (11) | 0.33892 (18) | 0.0188 (4) | |
C12 | 0.5825 (2) | 0.18048 (12) | 0.44404 (19) | 0.0199 (4) | |
C13 | 0.6046 (2) | 0.13633 (12) | 0.56012 (19) | 0.0226 (4) | |
H13A | 0.5603 | 0.1489 | 0.6328 | 0.027* | |
C14 | 0.6887 (2) | 0.07609 (12) | 0.56889 (19) | 0.0230 (4) | |
H14A | 0.6990 | 0.0465 | 0.6460 | 0.028* | |
C15 | 0.7602 (2) | 0.05723 (12) | 0.4647 (2) | 0.0237 (4) | |
C16 | 0.8472 (2) | −0.00510 (13) | 0.4718 (2) | 0.0314 (5) | |
H16A | 0.8557 | −0.0359 | 0.5470 | 0.038* | |
C17 | 0.9197 (3) | −0.02172 (15) | 0.3709 (3) | 0.0400 (6) | |
H17A | 0.9785 | −0.0635 | 0.3768 | 0.048* | |
C18 | 0.9062 (3) | 0.02348 (15) | 0.2593 (2) | 0.0379 (6) | |
H18A | 0.9570 | 0.0121 | 0.1902 | 0.046* | |
C19 | 0.8213 (2) | 0.08342 (13) | 0.2484 (2) | 0.0290 (5) | |
H19A | 0.8140 | 0.1133 | 0.1721 | 0.035* | |
C20 | 0.7435 (2) | 0.10180 (12) | 0.34986 (19) | 0.0214 (4) | |
C21 | 0.1953 (2) | 0.13983 (13) | 0.01918 (19) | 0.0236 (4) | |
C22 | 0.1457 (2) | 0.20685 (14) | 0.0442 (2) | 0.0304 (5) | |
H22A | 0.2161 | 0.2411 | 0.0892 | 0.036* | |
C23 | −0.0077 (3) | 0.22327 (16) | 0.0030 (2) | 0.0394 (6) | |
H23A | −0.0417 | 0.2692 | 0.0181 | 0.047* | |
C24 | −0.1110 (3) | 0.17319 (17) | −0.0599 (2) | 0.0400 (7) | |
H24A | −0.2156 | 0.1849 | −0.0877 | 0.048* | |
C25 | −0.0634 (3) | 0.10659 (18) | −0.0826 (2) | 0.0408 (7) | |
H25A | −0.1348 | 0.0721 | −0.1247 | 0.049* | |
C26 | 0.0910 (2) | 0.08985 (14) | −0.0434 (2) | 0.0319 (5) | |
H26A | 0.1244 | 0.0440 | −0.0598 | 0.038* | |
C31 | 0.4421 (2) | 0.05061 (13) | −0.0201 (2) | 0.0264 (5) | |
C32 | 0.3958 (3) | 0.05595 (14) | −0.1612 (2) | 0.0331 (5) | |
H32A | 0.3332 | 0.0940 | −0.2016 | 0.040* | |
C33 | 0.4419 (3) | 0.00526 (15) | −0.2422 (3) | 0.0416 (6) | |
H33A | 0.4089 | 0.0082 | −0.3381 | 0.050* | |
C34 | 0.5357 (3) | −0.04938 (15) | −0.1837 (3) | 0.0470 (7) | |
H34A | 0.5659 | −0.0842 | −0.2392 | 0.056* | |
C35 | 0.5854 (3) | −0.05318 (15) | −0.0438 (3) | 0.0437 (7) | |
H35A | 0.6535 | −0.0894 | −0.0037 | 0.052* | |
C36 | 0.5360 (2) | −0.00430 (13) | 0.0374 (3) | 0.0325 (5) | |
H36A | 0.5668 | −0.0084 | 0.1333 | 0.039* | |
C41 | 0.3149 (2) | 0.22762 (13) | 0.52049 (19) | 0.0245 (4) | |
C42 | 0.2696 (2) | 0.26796 (15) | 0.6187 (2) | 0.0324 (6) | |
H42A | 0.3207 | 0.3106 | 0.6501 | 0.039* | |
C43 | 0.1476 (3) | 0.24489 (18) | 0.6708 (2) | 0.0429 (7) | |
H43A | 0.1148 | 0.2725 | 0.7365 | 0.051* | |
C44 | 0.0756 (3) | 0.18276 (18) | 0.6274 (2) | 0.0436 (7) | |
H44A | −0.0053 | 0.1670 | 0.6648 | 0.052* | |
C45 | 0.1198 (3) | 0.14301 (17) | 0.5300 (3) | 0.0423 (7) | |
H45A | 0.0687 | 0.1003 | 0.4997 | 0.051* | |
C46 | 0.2394 (2) | 0.16534 (14) | 0.4759 (2) | 0.0323 (5) | |
H46A | 0.2693 | 0.1379 | 0.4084 | 0.039* | |
C51 | 0.5729 (2) | 0.32112 (12) | 0.55000 (19) | 0.0220 (4) | |
C52 | 0.7075 (2) | 0.30618 (13) | 0.6440 (2) | 0.0268 (5) | |
H52A | 0.7469 | 0.2596 | 0.6520 | 0.032* | |
C53 | 0.7844 (3) | 0.35944 (14) | 0.7260 (2) | 0.0314 (5) | |
H53A | 0.8773 | 0.3493 | 0.7889 | 0.038* | |
C54 | 0.7267 (2) | 0.42708 (13) | 0.7169 (2) | 0.0305 (5) | |
H54A | 0.7789 | 0.4630 | 0.7746 | 0.037* | |
C55 | 0.5933 (3) | 0.44237 (14) | 0.6238 (2) | 0.0362 (6) | |
H55A | 0.5539 | 0.4889 | 0.6169 | 0.043* | |
C56 | 0.5172 (3) | 0.38986 (13) | 0.5407 (2) | 0.0315 (5) | |
H56A | 0.4257 | 0.4007 | 0.4764 | 0.038* |
U11 | U22 | U33 | U12 | U13 | U23 | |
P1 | 0.0222 (2) | 0.0189 (3) | 0.0204 (2) | 0.0001 (2) | 0.00404 (18) | 0.0013 (2) |
P2 | 0.0231 (2) | 0.0192 (3) | 0.0193 (2) | 0.0008 (2) | 0.00613 (18) | −0.0002 (2) |
O1 | 0.0300 (8) | 0.0234 (8) | 0.0243 (7) | −0.0027 (7) | 0.0047 (6) | 0.0064 (7) |
O2 | 0.0311 (8) | 0.0238 (9) | 0.0208 (7) | 0.0040 (7) | 0.0053 (6) | 0.0027 (6) |
C1 | 0.0203 (9) | 0.0196 (11) | 0.0171 (9) | 0.0037 (8) | 0.0059 (7) | 0.0023 (8) |
C2 | 0.0210 (9) | 0.0180 (11) | 0.0206 (9) | 0.0001 (8) | 0.0063 (7) | 0.0012 (8) |
C3 | 0.0228 (10) | 0.0233 (11) | 0.0187 (9) | 0.0020 (9) | 0.0037 (7) | 0.0022 (8) |
C4 | 0.0278 (10) | 0.0227 (12) | 0.0212 (9) | 0.0035 (9) | 0.0065 (8) | 0.0058 (9) |
C5 | 0.0260 (10) | 0.0203 (11) | 0.0231 (10) | 0.0011 (9) | 0.0096 (8) | 0.0020 (9) |
C6 | 0.0327 (12) | 0.0221 (12) | 0.0308 (11) | −0.0008 (10) | 0.0084 (9) | 0.0044 (9) |
C7 | 0.0409 (14) | 0.0272 (14) | 0.0447 (14) | −0.0130 (11) | 0.0064 (11) | 0.0045 (11) |
C8 | 0.0389 (14) | 0.0344 (16) | 0.0335 (13) | −0.0104 (12) | −0.0029 (10) | 0.0010 (11) |
C9 | 0.0304 (11) | 0.0289 (13) | 0.0258 (10) | −0.0059 (10) | 0.0027 (8) | 0.0018 (9) |
C10 | 0.0232 (9) | 0.0193 (11) | 0.0215 (9) | 0.0001 (9) | 0.0068 (7) | 0.0004 (8) |
C11 | 0.0197 (9) | 0.0162 (10) | 0.0194 (9) | −0.0034 (8) | 0.0025 (7) | 0.0016 (8) |
C12 | 0.0212 (10) | 0.0177 (11) | 0.0201 (9) | −0.0015 (8) | 0.0034 (7) | 0.0008 (8) |
C13 | 0.0258 (10) | 0.0241 (12) | 0.0177 (9) | −0.0027 (9) | 0.0045 (8) | 0.0012 (8) |
C14 | 0.0235 (10) | 0.0224 (11) | 0.0209 (9) | −0.0004 (9) | 0.0010 (7) | 0.0070 (9) |
C15 | 0.0198 (9) | 0.0243 (12) | 0.0256 (10) | −0.0016 (9) | 0.0029 (8) | 0.0048 (9) |
C16 | 0.0286 (11) | 0.0274 (13) | 0.0383 (12) | 0.0069 (10) | 0.0084 (9) | 0.0109 (11) |
C17 | 0.0394 (13) | 0.0334 (15) | 0.0492 (15) | 0.0181 (12) | 0.0143 (11) | 0.0059 (12) |
C18 | 0.0357 (13) | 0.0419 (17) | 0.0391 (13) | 0.0158 (12) | 0.0148 (10) | 0.0041 (12) |
C19 | 0.0274 (11) | 0.0338 (14) | 0.0267 (10) | 0.0061 (10) | 0.0084 (8) | 0.0067 (10) |
C20 | 0.0183 (9) | 0.0206 (12) | 0.0236 (9) | 0.0013 (8) | 0.0015 (7) | 0.0019 (8) |
C21 | 0.0224 (10) | 0.0280 (12) | 0.0202 (9) | 0.0002 (9) | 0.0046 (8) | 0.0027 (9) |
C22 | 0.0259 (11) | 0.0330 (14) | 0.0331 (12) | 0.0015 (10) | 0.0087 (9) | 0.0021 (10) |
C23 | 0.0328 (12) | 0.0463 (17) | 0.0418 (13) | 0.0139 (12) | 0.0141 (10) | 0.0106 (13) |
C24 | 0.0232 (11) | 0.069 (2) | 0.0292 (12) | 0.0089 (13) | 0.0082 (9) | 0.0107 (13) |
C25 | 0.0281 (11) | 0.065 (2) | 0.0278 (11) | −0.0072 (13) | 0.0037 (9) | −0.0009 (13) |
C26 | 0.0297 (11) | 0.0376 (15) | 0.0275 (11) | −0.0011 (10) | 0.0051 (9) | −0.0038 (10) |
C31 | 0.0269 (10) | 0.0218 (12) | 0.0325 (11) | −0.0031 (9) | 0.0110 (9) | −0.0023 (9) |
C32 | 0.0425 (13) | 0.0303 (14) | 0.0308 (11) | −0.0039 (11) | 0.0172 (10) | −0.0024 (10) |
C33 | 0.0565 (16) | 0.0364 (16) | 0.0404 (14) | −0.0114 (13) | 0.0288 (12) | −0.0110 (12) |
C34 | 0.0571 (17) | 0.0310 (15) | 0.0651 (18) | −0.0071 (13) | 0.0388 (14) | −0.0174 (14) |
C35 | 0.0402 (14) | 0.0272 (15) | 0.0696 (19) | 0.0016 (12) | 0.0249 (13) | −0.0057 (14) |
C36 | 0.0299 (12) | 0.0237 (13) | 0.0452 (14) | 0.0010 (10) | 0.0112 (10) | 0.0003 (11) |
C41 | 0.0220 (9) | 0.0305 (12) | 0.0202 (9) | 0.0021 (9) | 0.0037 (7) | 0.0060 (9) |
C42 | 0.0318 (11) | 0.0418 (16) | 0.0243 (10) | 0.0069 (11) | 0.0083 (8) | 0.0026 (10) |
C43 | 0.0344 (12) | 0.069 (2) | 0.0283 (12) | 0.0155 (14) | 0.0142 (9) | 0.0094 (13) |
C44 | 0.0260 (12) | 0.070 (2) | 0.0371 (13) | 0.0040 (13) | 0.0123 (10) | 0.0242 (14) |
C45 | 0.0248 (12) | 0.0510 (18) | 0.0483 (15) | −0.0053 (12) | 0.0030 (10) | 0.0153 (13) |
C46 | 0.0249 (11) | 0.0382 (15) | 0.0331 (12) | −0.0014 (10) | 0.0057 (9) | 0.0076 (11) |
C51 | 0.0252 (10) | 0.0206 (11) | 0.0215 (9) | −0.0018 (9) | 0.0083 (8) | −0.0017 (8) |
C52 | 0.0271 (11) | 0.0217 (12) | 0.0314 (11) | 0.0024 (9) | 0.0064 (9) | −0.0023 (9) |
C53 | 0.0264 (11) | 0.0356 (15) | 0.0316 (12) | −0.0035 (10) | 0.0055 (9) | −0.0041 (10) |
C54 | 0.0364 (12) | 0.0261 (13) | 0.0302 (11) | −0.0072 (11) | 0.0105 (9) | −0.0082 (10) |
C55 | 0.0480 (15) | 0.0235 (13) | 0.0367 (13) | 0.0017 (12) | 0.0093 (11) | −0.0063 (11) |
C56 | 0.0352 (12) | 0.0267 (13) | 0.0301 (11) | 0.0058 (10) | 0.0028 (9) | −0.0014 (10) |
P1—O1 | 1.4824 (14) | C17—C18 | 1.404 (3) |
P1—C21 | 1.806 (2) | C18—C19 | 1.364 (3) |
P1—C2 | 1.811 (2) | C19—C20 | 1.422 (3) |
P1—C31 | 1.813 (2) | C21—C26 | 1.384 (3) |
P2—O2 | 1.4828 (14) | C21—C22 | 1.393 (3) |
P2—C51 | 1.807 (2) | C22—C23 | 1.391 (3) |
P2—C41 | 1.814 (2) | C23—C24 | 1.381 (4) |
P2—C12 | 1.817 (2) | C24—C25 | 1.373 (4) |
C1—C2 | 1.391 (3) | C25—C26 | 1.399 (3) |
C1—C10 | 1.430 (3) | C31—C36 | 1.386 (3) |
C1—C11 | 1.501 (3) | C31—C32 | 1.399 (3) |
C2—C3 | 1.420 (3) | C32—C33 | 1.393 (3) |
C3—C4 | 1.365 (3) | C33—C34 | 1.384 (4) |
C4—C5 | 1.415 (3) | C34—C35 | 1.387 (4) |
C5—C6 | 1.421 (3) | C35—C36 | 1.385 (3) |
C5—C10 | 1.423 (3) | C41—C46 | 1.388 (3) |
C6—C7 | 1.374 (3) | C41—C42 | 1.394 (3) |
C7—C8 | 1.408 (3) | C42—C43 | 1.404 (3) |
C8—C9 | 1.360 (3) | C43—C44 | 1.370 (4) |
C9—C10 | 1.419 (3) | C44—C45 | 1.377 (4) |
C11—C12 | 1.382 (3) | C45—C46 | 1.392 (3) |
C11—C20 | 1.435 (3) | C51—C52 | 1.390 (3) |
C12—C13 | 1.422 (3) | C51—C56 | 1.395 (3) |
C13—C14 | 1.366 (3) | C52—C53 | 1.389 (3) |
C14—C15 | 1.412 (3) | C53—C54 | 1.382 (3) |
C15—C16 | 1.415 (3) | C54—C55 | 1.379 (3) |
C15—C20 | 1.420 (3) | C55—C56 | 1.382 (3) |
C16—C17 | 1.378 (3) | ||
O1—P1—C21 | 110.64 (9) | C16—C15—C20 | 119.41 (19) |
O1—P1—C2 | 114.34 (9) | C17—C16—C15 | 120.8 (2) |
C21—P1—C2 | 107.40 (10) | C16—C17—C18 | 119.6 (2) |
O1—P1—C31 | 111.34 (10) | C19—C18—C17 | 121.1 (2) |
C21—P1—C31 | 107.03 (10) | C18—C19—C20 | 120.9 (2) |
C2—P1—C31 | 105.69 (9) | C15—C20—C19 | 118.25 (19) |
O2—P2—C51 | 111.77 (10) | C15—C20—C11 | 119.44 (17) |
O2—P2—C41 | 111.71 (8) | C19—C20—C11 | 122.30 (18) |
C51—P2—C41 | 106.23 (10) | C26—C21—C22 | 119.66 (19) |
O2—P2—C12 | 116.63 (9) | C26—C21—P1 | 119.12 (18) |
C51—P2—C12 | 105.70 (9) | C22—C21—P1 | 120.19 (17) |
C41—P2—C12 | 103.97 (10) | C23—C22—C21 | 119.5 (2) |
C2—C1—C10 | 119.79 (17) | C24—C23—C22 | 120.4 (3) |
C2—C1—C11 | 121.69 (18) | C25—C24—C23 | 120.4 (2) |
C10—C1—C11 | 118.52 (16) | C24—C25—C26 | 119.7 (3) |
C1—C2—C3 | 119.56 (19) | C21—C26—C25 | 120.3 (2) |
C1—C2—P1 | 121.76 (15) | C36—C31—C32 | 119.5 (2) |
C3—C2—P1 | 118.69 (15) | C36—C31—P1 | 116.91 (17) |
C4—C3—C2 | 121.39 (18) | C32—C31—P1 | 123.57 (19) |
C3—C4—C5 | 120.47 (19) | C33—C32—C31 | 119.7 (2) |
C4—C5—C6 | 121.83 (19) | C34—C33—C32 | 120.3 (2) |
C4—C5—C10 | 119.22 (19) | C33—C34—C35 | 119.8 (2) |
C6—C5—C10 | 118.95 (19) | C36—C35—C34 | 120.2 (3) |
C7—C6—C5 | 120.7 (2) | C35—C36—C31 | 120.4 (2) |
C6—C7—C8 | 120.1 (2) | C46—C41—C42 | 119.7 (2) |
C9—C8—C7 | 120.5 (2) | C46—C41—P2 | 118.01 (17) |
C8—C9—C10 | 121.3 (2) | C42—C41—P2 | 122.13 (19) |
C9—C10—C5 | 118.43 (19) | C41—C42—C43 | 119.3 (3) |
C9—C10—C1 | 122.12 (18) | C44—C43—C42 | 120.4 (2) |
C5—C10—C1 | 119.45 (17) | C43—C44—C45 | 120.4 (2) |
C12—C11—C20 | 119.84 (18) | C44—C45—C46 | 120.1 (3) |
C12—C11—C1 | 121.75 (18) | C41—C46—C45 | 120.1 (2) |
C20—C11—C1 | 118.41 (16) | C52—C51—C56 | 118.9 (2) |
C11—C12—C13 | 119.70 (19) | C52—C51—P2 | 124.57 (18) |
C11—C12—P2 | 122.45 (15) | C56—C51—P2 | 116.54 (16) |
C13—C12—P2 | 117.81 (15) | C53—C52—C51 | 119.9 (2) |
C14—C13—C12 | 121.06 (18) | C54—C53—C52 | 120.5 (2) |
C13—C14—C15 | 120.79 (19) | C55—C54—C53 | 119.9 (2) |
C14—C15—C16 | 121.6 (2) | C54—C55—C56 | 119.9 (2) |
C14—C15—C20 | 119.0 (2) | C55—C56—C51 | 120.9 (2) |