Tricarbon-yl(η-flavone)chromium(0).

In the title compound, [Cr(C(15)H(10)O(2))(CO)(3)], the Cr(CO)(3) unit exhibits a three-legged piano-stool conformation. The chromium metal centre is coordinated by the phenyl ring of the flavone ligand [Cr-(phenyl centroid) distance = 1.709 (1) Å]. The ligand is approximately planar, the dihedral angles between the γ-pyrone ring and the phenyl ring and between the γ-pyrone and the phenyl-ene ring being 2.91 (5) and 3.90 (5)°, respectively. The mol-ecular packing shows π-π stacking between the flavone ligands of neighbouring mol-ecules.

Related literature

For the crystal structure of Cr(CO)3(C15H12O2), see: Dominique et al. (1999 ▶). For comparison bond distances, see: Allen (2002 ▶). For related structures, see: Zeller et al. (2004 ▶); Zhang et al. (2005 ▶); Czerwinski et al. (2003 ▶); Guzei & Czerwinski (2004 ▶). For the biological activity of flavonoids, see: Rice-Evans & Packer (2003 ▶).

Experimental

Crystal data

[Cr(C15H10O2)(CO)3]

M = 358.26

Triclinic,

a = 7.2853 (2) Å

b = 9.6427 (3) Å

c = 11.6466 (4) Å

α = 78.545 (1)°

β = 79.554 (1)°

γ = 70.005 (1)°

V = 747.81 (4) Å3

Z = 2

Mo Kα radiation

μ = 0.79 mm−1

T = 173 K

0.45 × 0.32 × 0.19 mm

Data collection

Bruker APEXII CCD diffractometer

Absorption correction: multi-scan (SADABS; Bruker, 2004 ▶) T min = 0.717, T max = 0.864

8083 measured reflections

3600 independent reflections

3062 reflections with I > 2σ(I)

R int = 0.022

Refinement

R[F 2 > 2σ(F 2)] = 0.037

wR(F 2) = 0.105

S = 1.06

3600 reflections

205 parameters

H-atom parameters constrained

Δρmax = 0.52 e Å−3

Δρmin = −0.55 e Å−3

Data collection: APEX2 (Bruker, 2005 ▶); cell refinement: SAINT-Plus (Bruker, 2004 ▶); data reduction: SAINT-Plus; program(s) used to solve structure: SIR97 (Altomare et al., 1999 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: DIAMOND (Brandenburg & Putz, 2005 ▶); software used to prepare material for publication: WinGX (Farrugia, 1999 ▶).

Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536809040525/ng2657sup1.cif

Structure factors: contains datablocks I. DOI: 10.1107/S1600536809040525/ng2657Isup2.hkl

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

[Cr(C15H10O2)(CO)3]	Z = 2
Mr = 358.26	F(000) = 364
Triclinic, P1	Dx = 1.591 Mg m−3
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 7.2853 (2) Å	Cell parameters from 3694 reflections
b = 9.6427 (3) Å	θ = 2.3–28.2°
c = 11.6466 (4) Å	µ = 0.79 mm−1
α = 78.545 (1)°	T = 173 K
β = 79.554 (1)°	Irregular, orange
γ = 70.005 (1)°	0.45 × 0.32 × 0.19 mm
V = 747.81 (4) Å3

Bruker APEXII CCD diffractometer	3600 independent reflections
Radiation source: fine-focus sealed tube	3062 reflections with I > 2σ(I)
graphite	Rint = 0.022
φ and ω scans	θmax = 28°, θmin = 1.8°
Absorption correction: multi-scan (SADABS; Bruker, 2004)	h = −9→8
Tmin = 0.717, Tmax = 0.864	k = −12→12
8083 measured reflections	l = −15→14

Refinement on F2	0 restraints
Least-squares matrix: full	H-atom parameters constrained
R[F2 > 2σ(F2)] = 0.037	w = 1/[σ2(Fo2) + (0.0513P)2 + 0.3895P] where P = (Fo2 + 2Fc2)/3
wR(F2) = 0.105	(Δ/σ)max = 0.001
S = 1.06	Δρmax = 0.52 e Å−3
3600 reflections	Δρmin = −0.55 e Å−3
205 parameters

Experimental. The intensity data was collected on a Bruker Apex II CCD diffractometer using an exposure time of 10 s/frame. The 509 frames were collected with a frame width of 0.5° covering up to θ = 28° with 99.8% completeness accomplished.

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.

	x	y	z	Uiso*/Ueq
Cr	0.44722 (4)	0.35008 (3)	0.85182 (3)	0.02434 (11)
O5	0.6342 (2)	0.24078 (16)	0.52790 (12)	0.0282 (3)
O4	1.1793 (2)	0.29078 (17)	0.44675 (15)	0.0349 (4)
O3	0.2698 (2)	0.3373 (2)	1.10514 (14)	0.0421 (4)
C2	0.6832 (3)	0.3367 (2)	0.57827 (16)	0.0241 (4)
C3	0.8617 (3)	0.3562 (2)	0.55295 (18)	0.0267 (4)
H3	0.8879	0.4247	0.591	0.032*
C10	0.9548 (3)	0.1789 (2)	0.41199 (17)	0.0249 (4)
C13	0.3382 (3)	0.3412 (2)	1.00763 (19)	0.0292 (3)
O1	0.4968 (3)	0.02553 (19)	0.86574 (17)	0.0499 (5)
C9	0.7671 (3)	0.1667 (2)	0.44291 (18)	0.0273 (4)
C12	0.6912 (3)	0.2990 (2)	0.90154 (18)	0.0292 (3)
O2	0.8445 (2)	0.26801 (19)	0.93196 (16)	0.0425 (3)
C5	1.0793 (3)	0.1028 (2)	0.32237 (19)	0.0311 (4)
H5	1.2083	0.1097	0.2999	0.037*
C2'	0.5336 (3)	0.5228 (2)	0.72042 (18)	0.0278 (4)
H2'	0.653	0.5461	0.7082	0.033*
C1'	0.5171 (3)	0.4148 (2)	0.65939 (17)	0.0257 (4)
C4	1.0145 (3)	0.2762 (2)	0.46978 (17)	0.0255 (4)
C6'	0.3370 (3)	0.3817 (2)	0.68058 (18)	0.0306 (4)
H6'	0.3226	0.3099	0.6406	0.037*
C11	0.4775 (3)	0.1501 (2)	0.86148 (18)	0.02916 (17)
C3'	0.3758 (3)	0.5956 (2)	0.79855 (19)	0.0317 (5)
H3'	0.3872	0.67	0.8369	0.038*
C8	0.7000 (4)	0.0807 (2)	0.3874 (2)	0.0348 (5)
H8	0.5712	0.0733	0.4094	0.042*
C4'	0.2009 (3)	0.5587 (3)	0.8202 (2)	0.0354 (5)
H4'	0.0964	0.6049	0.876	0.042*
C5'	0.1799 (3)	0.4541 (3)	0.7601 (2)	0.0361 (5)
H5'	0.0597	0.4319	0.7728	0.043*
C7	0.8262 (4)	0.0070 (3)	0.3002 (2)	0.0398 (5)
H7	0.7839	−0.0528	0.2617	0.048*
C6	1.0148 (4)	0.0180 (2)	0.2667 (2)	0.0381 (5)
H6	1.099	−0.0332	0.2055	0.046*

	U11	U22	U33	U12	U13	U23
Cr	0.01993 (17)	0.02901 (19)	0.02080 (17)	−0.00703 (13)	−0.00249 (12)	0.00247 (12)
O5	0.0261 (7)	0.0341 (7)	0.0279 (7)	−0.0153 (6)	−0.0025 (6)	−0.0027 (6)
O4	0.0274 (8)	0.0387 (8)	0.0435 (9)	−0.0175 (7)	0.0046 (7)	−0.0124 (7)
O3	0.0351 (9)	0.0547 (10)	0.0292 (8)	−0.0129 (8)	0.0047 (7)	−0.0001 (7)
C2	0.0270 (10)	0.0263 (9)	0.0193 (9)	−0.0107 (8)	−0.0069 (8)	0.0040 (7)
C3	0.0283 (10)	0.0280 (10)	0.0264 (10)	−0.0130 (8)	−0.0034 (8)	−0.0029 (8)
C10	0.0284 (10)	0.0215 (9)	0.0242 (9)	−0.0093 (8)	−0.0069 (8)	0.0033 (7)
C13	0.0240 (7)	0.0315 (7)	0.0279 (7)	−0.0069 (6)	−0.0014 (6)	0.0000 (6)
O1	0.0698 (13)	0.0385 (9)	0.0470 (10)	−0.0233 (9)	−0.0162 (10)	0.0000 (8)
C9	0.0333 (11)	0.0253 (9)	0.0247 (9)	−0.0127 (8)	−0.0075 (8)	0.0030 (8)
C12	0.0240 (7)	0.0315 (7)	0.0279 (7)	−0.0069 (6)	−0.0014 (6)	0.0000 (6)
O2	0.0299 (6)	0.0450 (6)	0.0502 (6)	−0.0059 (7)	−0.0131 (7)	−0.0045 (8)
C5	0.0355 (11)	0.0258 (10)	0.0305 (10)	−0.0085 (9)	−0.0039 (9)	−0.0034 (8)
C2'	0.0260 (10)	0.0272 (10)	0.0264 (10)	−0.0083 (8)	−0.0029 (8)	0.0044 (8)
C1'	0.0222 (9)	0.0312 (10)	0.0199 (9)	−0.0083 (8)	−0.0037 (7)	0.0052 (7)
C4	0.0284 (10)	0.0241 (9)	0.0244 (9)	−0.0116 (8)	−0.0020 (8)	0.0001 (7)
C6'	0.0258 (10)	0.0405 (12)	0.0239 (10)	−0.0111 (9)	−0.0070 (8)	0.0036 (8)
C11	0.0240 (2)	0.03146 (19)	0.02793 (16)	−0.0069 (6)	−0.0014 (6)	0.0000 (6)
C3'	0.0316 (11)	0.0271 (10)	0.0284 (10)	−0.0026 (8)	−0.0039 (9)	0.0022 (8)
C8	0.0392 (12)	0.0337 (11)	0.0379 (12)	−0.0180 (10)	−0.0123 (10)	−0.0014 (9)
C4'	0.0249 (11)	0.0385 (12)	0.0302 (11)	0.0005 (9)	−0.0026 (9)	0.0039 (9)
C5'	0.0190 (10)	0.0506 (13)	0.0312 (11)	−0.0079 (9)	−0.0061 (8)	0.0081 (10)
C7	0.0534 (15)	0.0326 (11)	0.0410 (13)	−0.0176 (11)	−0.0167 (11)	−0.0055 (10)
C6	0.0457 (14)	0.0303 (11)	0.0368 (12)	−0.0072 (10)	−0.0060 (10)	−0.0095 (9)

Cr—C13	1.842 (2)	C9—C8	1.396 (3)
Cr—C12	1.844 (2)	C12—O2	1.155 (3)
Cr—C11	1.847 (2)	C5—C6	1.376 (3)
Cr—C2'	2.206 (2)	C5—H5	0.95
Cr—C4'	2.209 (2)	C2'—C3'	1.402 (3)
Cr—C6'	2.211 (2)	C2'—C1'	1.420 (3)
Cr—C1'	2.2180 (19)	C2'—H2'	0.95
Cr—C5'	2.221 (2)	C1'—C6'	1.422 (3)
Cr—C3'	2.225 (2)	C6'—C5'	1.407 (3)
O5—C2	1.358 (2)	C6'—H6'	0.95
O5—C9	1.374 (3)	C3'—C4'	1.404 (3)
O4—C4	1.232 (2)	C3'—H3'	0.95
O3—C13	1.153 (3)	C8—C7	1.373 (3)
C2—C3	1.349 (3)	C8—H8	0.95
C2—C1'	1.473 (3)	C4'—C5'	1.399 (3)
C3—C4	1.446 (3)	C4'—H4'	0.95
C3—H3	0.95	C5'—H5'	0.95
C10—C9	1.388 (3)	C7—C6	1.393 (4)
C10—C5	1.399 (3)	C7—H7	0.95
C10—C4	1.469 (3)	C6—H6	0.95
O1—C11	1.153 (3)
C13—Cr—C12	88.71 (9)	C6—C5—H5	120
C13—Cr—C11	88.80 (9)	C10—C5—H5	120
C12—Cr—C11	89.60 (9)	C3'—C2'—C1'	120.78 (19)
C13—Cr—C2'	134.26 (9)	C3'—C2'—Cr	72.30 (12)
C12—Cr—C2'	86.71 (8)	C1'—C2'—Cr	71.73 (11)
C11—Cr—C2'	136.58 (9)	C3'—C2'—H2'	119.6
C13—Cr—C4'	85.97 (9)	C1'—C2'—H2'	119.6
C12—Cr—C4'	135.57 (9)	Cr—C2'—H2'	128.7
C11—Cr—C4'	134.24 (9)	C2'—C1'—C6'	118.15 (19)
C2'—Cr—C4'	66.83 (8)	C2'—C1'—C2	121.01 (18)
C13—Cr—C6'	135.41 (9)	C6'—C1'—C2	120.83 (18)
C12—Cr—C6'	135.54 (9)	C2'—C1'—Cr	70.84 (11)
C11—Cr—C6'	86.67 (9)	C6'—C1'—Cr	70.99 (11)
C2'—Cr—C6'	67.00 (8)	C2—C1'—Cr	128.43 (13)
C4'—Cr—C6'	66.69 (9)	O4—C4—C3	123.10 (18)
C13—Cr—C1'	165.52 (8)	O4—C4—C10	122.58 (19)
C12—Cr—C1'	101.05 (8)	C3—C4—C10	114.29 (17)
C11—Cr—C1'	101.82 (8)	C5'—C6'—C1'	120.8 (2)
C2'—Cr—C1'	37.43 (8)	C5'—C6'—Cr	71.90 (12)
C4'—Cr—C1'	79.57 (8)	C1'—C6'—Cr	71.55 (11)
C6'—Cr—C1'	37.46 (7)	C5'—C6'—H6'	119.6
C13—Cr—C5'	101.29 (9)	C1'—C6'—H6'	119.6
C12—Cr—C5'	165.57 (9)	Cr—C6'—H6'	129.4
C11—Cr—C5'	100.88 (9)	O1—C11—Cr	179.00 (19)
C2'—Cr—C5'	78.86 (8)	C2'—C3'—C4'	120.1 (2)
C4'—Cr—C5'	36.82 (9)	C2'—C3'—Cr	70.83 (12)
C6'—Cr—C5'	37.02 (8)	C4'—C3'—Cr	70.90 (12)
C1'—Cr—C5'	67.29 (8)	C2'—C3'—H3'	119.9
C13—Cr—C3'	100.70 (9)	C4'—C3'—H3'	119.9
C12—Cr—C3'	101.88 (9)	Cr—C3'—H3'	131
C11—Cr—C3'	165.16 (9)	C7—C8—C9	117.8 (2)
C2'—Cr—C3'	36.87 (8)	C7—C8—H8	121.1
C4'—Cr—C3'	36.92 (8)	C9—C8—H8	121.1
C6'—Cr—C3'	78.55 (8)	C5'—C4'—C3'	120.2 (2)
C1'—Cr—C3'	67.01 (8)	C5'—C4'—Cr	72.06 (13)
C5'—Cr—C3'	66.27 (9)	C3'—C4'—Cr	72.17 (12)
C2—O5—C9	118.91 (15)	C5'—C4'—H4'	119.9
C3—C2—O5	122.59 (18)	C3'—C4'—H4'	119.9
C3—C2—C1'	126.27 (18)	Cr—C4'—H4'	128
O5—C2—C1'	111.14 (16)	C4'—C5'—C6'	119.9 (2)
C2—C3—C4	122.13 (18)	C4'—C5'—Cr	71.11 (12)
C2—C3—H3	118.9	C6'—C5'—Cr	71.08 (11)
C4—C3—H3	118.9	C4'—C5'—H5'	120
C9—C10—C5	118.77 (19)	C6'—C5'—H5'	120
C9—C10—C4	119.53 (19)	Cr—C5'—H5'	130.3
C5—C10—C4	121.63 (18)	C8—C7—C6	121.5 (2)
O3—C13—Cr	179.21 (19)	C8—C7—H7	119.2
O5—C9—C10	122.38 (17)	C6—C7—H7	119.2
O5—C9—C8	115.70 (19)	C5—C6—C7	120.0 (2)
C10—C9—C8	121.9 (2)	C5—C6—H6	120
O2—C12—Cr	179.4 (2)	C7—C6—H6	120
C6—C5—C10	119.9 (2)
C9—O5—C2—C3	−3.8 (3)	C11—Cr—C6'—C5'	113.02 (14)
C9—O5—C2—C1'	175.14 (15)	C2'—Cr—C6'—C5'	−102.38 (15)
O5—C2—C3—C4	0.1 (3)	C4'—Cr—C6'—C5'	−28.79 (13)
C1'—C2—C3—C4	−178.63 (17)	C1'—Cr—C6'—C5'	−132.57 (19)
C2—O5—C9—C10	4.3 (3)	C3'—Cr—C6'—C5'	−65.58 (14)
C2—O5—C9—C8	−174.35 (17)	C13—Cr—C6'—C1'	160.68 (13)
C5—C10—C9—O5	−178.36 (17)	C12—Cr—C6'—C1'	−28.37 (18)
C4—C10—C9—O5	−1.2 (3)	C11—Cr—C6'—C1'	−114.41 (13)
C5—C10—C9—C8	0.2 (3)	C2'—Cr—C6'—C1'	30.19 (12)
C4—C10—C9—C8	177.37 (18)	C4'—Cr—C6'—C1'	103.78 (14)
C9—C10—C5—C6	0.0 (3)	C5'—Cr—C6'—C1'	132.57 (19)
C4—C10—C5—C6	−177.10 (19)	C3'—Cr—C6'—C1'	66.99 (13)
C13—Cr—C2'—C3'	−29.87 (18)	C1'—C2'—C3'—C4'	2.1 (3)
C12—Cr—C2'—C3'	−114.84 (14)	Cr—C2'—C3'—C4'	−52.98 (17)
C11—Cr—C2'—C3'	159.22 (14)	C1'—C2'—C3'—Cr	55.03 (16)
C4'—Cr—C2'—C3'	28.54 (13)	C13—Cr—C3'—C2'	158.72 (13)
C6'—Cr—C2'—C3'	101.93 (14)	C12—Cr—C3'—C2'	67.79 (14)
C1'—Cr—C2'—C3'	132.14 (18)	C11—Cr—C3'—C2'	−72.2 (4)
C5'—Cr—C2'—C3'	65.10 (13)	C4'—Cr—C3'—C2'	−133.0 (2)
C13—Cr—C2'—C1'	−162.01 (13)	C6'—Cr—C3'—C2'	−66.76 (13)
C12—Cr—C2'—C1'	113.01 (13)	C1'—Cr—C3'—C2'	−29.31 (12)
C11—Cr—C2'—C1'	27.07 (17)	C5'—Cr—C3'—C2'	−103.55 (14)
C4'—Cr—C2'—C1'	−103.61 (13)	C13—Cr—C3'—C4'	−68.25 (15)
C6'—Cr—C2'—C1'	−30.22 (12)	C12—Cr—C3'—C4'	−159.19 (14)
C5'—Cr—C2'—C1'	−67.04 (12)	C11—Cr—C3'—C4'	60.8 (4)
C3'—Cr—C2'—C1'	−132.14 (18)	C2'—Cr—C3'—C4'	133.0 (2)
C3'—C2'—C1'—C6'	−0.5 (3)	C6'—Cr—C3'—C4'	66.26 (13)
Cr—C2'—C1'—C6'	54.75 (15)	C1'—Cr—C3'—C4'	103.72 (14)
C3'—C2'—C1'—C2	−179.27 (17)	C5'—Cr—C3'—C4'	29.48 (13)
Cr—C2'—C1'—C2	−123.97 (17)	O5—C9—C8—C7	178.69 (19)
C3'—C2'—C1'—Cr	−55.30 (17)	C10—C9—C8—C7	0.0 (3)
C3—C2—C1'—C2'	0.1 (3)	C2'—C3'—C4'—C5'	−2.9 (3)
O5—C2—C1'—C2'	−178.79 (16)	Cr—C3'—C4'—C5'	−55.84 (18)
C3—C2—C1'—C6'	−178.62 (18)	C2'—C3'—C4'—Cr	52.95 (17)
O5—C2—C1'—C6'	2.5 (2)	C13—Cr—C4'—C5'	−114.93 (14)
C3—C2—C1'—Cr	−89.2 (2)	C12—Cr—C4'—C5'	161.05 (14)
O5—C2—C1'—Cr	91.89 (19)	C11—Cr—C4'—C5'	−30.55 (19)
C13—Cr—C1'—C2'	62.2 (4)	C2'—Cr—C4'—C5'	102.77 (14)
C12—Cr—C1'—C2'	−69.43 (13)	C6'—Cr—C4'—C5'	28.94 (13)
C11—Cr—C1'—C2'	−161.36 (12)	C1'—Cr—C4'—C5'	65.85 (13)
C4'—Cr—C1'—C2'	65.30 (12)	C3'—Cr—C4'—C5'	131.3 (2)
C6'—Cr—C1'—C2'	130.39 (18)	C13—Cr—C4'—C3'	113.80 (14)
C5'—Cr—C1'—C2'	101.66 (14)	C12—Cr—C4'—C3'	29.78 (19)
C3'—Cr—C1'—C2'	28.90 (12)	C11—Cr—C4'—C3'	−161.82 (14)
C13—Cr—C1'—C6'	−68.2 (4)	C2'—Cr—C4'—C3'	−28.50 (13)
C12—Cr—C1'—C6'	160.18 (13)	C6'—Cr—C4'—C3'	−102.33 (14)
C11—Cr—C1'—C6'	68.24 (14)	C1'—Cr—C4'—C3'	−65.42 (13)
C2'—Cr—C1'—C6'	−130.39 (18)	C5'—Cr—C4'—C3'	−131.3 (2)
C4'—Cr—C1'—C6'	−65.09 (13)	C3'—C4'—C5'—C6'	2.2 (3)
C5'—Cr—C1'—C6'	−28.73 (13)	Cr—C4'—C5'—C6'	−53.67 (18)
C3'—Cr—C1'—C6'	−101.49 (14)	C3'—C4'—C5'—Cr	55.89 (17)
C13—Cr—C1'—C2	177.0 (3)	C1'—C6'—C5'—C4'	−0.7 (3)
C12—Cr—C1'—C2	45.44 (19)	Cr—C6'—C5'—C4'	53.69 (18)
C11—Cr—C1'—C2	−46.49 (19)	C1'—C6'—C5'—Cr	−54.40 (17)
C2'—Cr—C1'—C2	114.9 (2)	C13—Cr—C5'—C4'	67.28 (14)
C4'—Cr—C1'—C2	−179.83 (19)	C12—Cr—C5'—C4'	−65.8 (4)
C6'—Cr—C1'—C2	−114.7 (2)	C11—Cr—C5'—C4'	158.24 (14)
C5'—Cr—C1'—C2	−143.5 (2)	C2'—Cr—C5'—C4'	−66.03 (13)
C3'—Cr—C1'—C2	143.77 (19)	C6'—Cr—C5'—C4'	−132.4 (2)
C2—C3—C4—O4	−178.92 (19)	C1'—Cr—C5'—C4'	−103.38 (14)
C2—C3—C4—C10	2.9 (3)	C3'—Cr—C5'—C4'	−29.55 (13)
C9—C10—C4—O4	179.48 (18)	C13—Cr—C5'—C6'	−160.28 (13)
C5—C10—C4—O4	−3.4 (3)	C12—Cr—C5'—C6'	66.6 (4)
C9—C10—C4—C3	−2.3 (3)	C11—Cr—C5'—C6'	−69.33 (14)
C5—C10—C4—C3	174.81 (18)	C2'—Cr—C5'—C6'	66.40 (13)
C2'—C1'—C6'—C5'	−0.1 (3)	C4'—Cr—C5'—C6'	132.4 (2)
C2—C1'—C6'—C5'	178.61 (18)	C1'—Cr—C5'—C6'	29.05 (12)
Cr—C1'—C6'—C5'	54.56 (17)	C3'—Cr—C5'—C6'	102.88 (14)
C2'—C1'—C6'—Cr	−54.68 (16)	C9—C8—C7—C6	−0.5 (3)
C2—C1'—C6'—Cr	124.05 (17)	C10—C5—C6—C7	−0.4 (3)
C13—Cr—C6'—C5'	28.11 (19)	C8—C7—C6—C5	0.7 (4)
C12—Cr—C6'—C5'	−160.94 (14)