Tetra-kis(μ-4-methyl-benzoato-κO:O')bis-{[4-(dimethyl-amino)pyridine-κN]zinc(II)}.

In the centrosymmetric title binuclear complex, [Zn(2)(C(8)H(7)O(2))(4)(C(7)H(10)N(2))(2)], the Zn atoms [Zn⋯Zn = 3.0287 (6) Å] are bridged by four 4-methyl-benzoate ligands. The four nearest O atoms around each Zn(II) atom form a distorted square-planar arrangement with the distorted square-pyramidal coordination completed by the pyridine N atom of the 4-(dimethyl-amino)pyridine ligand. In the crystal structure, weak inter-molecular C-H⋯O inter-actions link the mol-ecules into infinite chains. The chains are further linked by weak C-H⋯π inter-actions, forming a three-dimensional network.

Related literature

For potential applications of organometallic complexes, see: Sommerfeldt et al. (2008 ▶); Huang et al. (2007 ▶); Neville et al. (2008 ▶). Zinc derivatives are used in photodynamic therapy because of their unique photosensitizing properties, see: Tabata et al. (2000 ▶); Shi et al. (2008 ▶); Xiao et al. (2008 ▶); Yang et al. (2008 ▶). For comparative bond lengths, see: Halcrow et al. (2000 ▶); For related structures, see: Yang et al. (2004 ▶); You et al. (2003 ▶, 2004 ▶); Wang et al. (2009 ▶).

Experimental

Crystal data

[Zn2(C8H7O2)4(C7H10N2)2]

M = 915.66

Monoclinic,

a = 8.9311 (18) Å

b = 9.967 (2) Å

c = 24.756 (5) Å

β = 90.64 (3)°

V = 2203.5 (8) Å3

Z = 2

Mo Kα radiation

μ = 1.15 mm−1

T = 294 K

0.30 × 0.20 × 0.20 mm

Data collection

Bruker APEXII CCD area-detector diffractometer

Absorption correction: ψ scan (SADABS; Sheldrick, 1996 ▶) T min = 0.758, T max = 0.792

12095 measured reflections

4326 independent reflections

3432 reflections with I > 2σ(I)

R int = 0.020

Refinement

R[F 2 > 2σ(F 2)] = 0.031

wR(F 2) = 0.085

S = 1.03

4326 reflections

275 parameters

H-atom parameters constrained

Δρmax = 0.21 e Å−3

Δρmin = −0.28 e Å−3

Data collection: SMART (Bruker, 2000 ▶); cell refinement: SAINT (Bruker, 2000 ▶); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: SHELXTL (Sheldrick, 2008 ▶); software used to prepare material for publication: SHELXTL.

Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536809027603/hk2733sup1.cif

Structure factors: contains datablocks I. DOI: 10.1107/S1600536809027603/hk2733Isup2.hkl

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

[Zn2(C8H7O2)4(C7H10N2)2]	F(000) = 952
Mr = 915.66	Dx = 1.380 Mg m−3
Monoclinic, P21/n	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2yn	Cell parameters from 3875 reflections
a = 8.9311 (18) Å	θ = 1.8–29.5°
b = 9.967 (2) Å	µ = 1.15 mm−1
c = 24.756 (5) Å	T = 294 K
β = 90.64 (3)°	Block, colorless
V = 2203.5 (8) Å3	0.30 × 0.20 × 0.20 mm
Z = 2

Bruker APEXII CCD area-detector diffractometer	4326 independent reflections
Radiation source: fine-focus sealed tube	3432 reflections with I > 2σ(I)
graphite	Rint = 0.020
φ and ω scans	θmax = 26.0°, θmin = 1.7°
Absorption correction: ψ scan (SADABS; Sheldrick, 1996)	h = −11→10
Tmin = 0.758, Tmax = 0.792	k = −11→12
12095 measured reflections	l = −30→28

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)] = 0.031	Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.085	H-atom parameters constrained
S = 1.03	w = 1/[σ2(Fo2) + (0.0468P)2 + 0.3207P] where P = (Fo2 + 2Fc2)/3
4326 reflections	(Δ/σ)max = 0.001
275 parameters	Δρmax = 0.21 e Å−3
0 restraints	Δρmin = −0.28 e Å−3

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
Zn1	1.13033 (2)	0.90381 (2)	0.006145 (10)	0.05090 (10)
O1	0.83151 (18)	0.93234 (15)	−0.05487 (7)	0.0678 (4)
O2	1.01833 (16)	0.78450 (16)	−0.04910 (6)	0.0653 (4)
O3	0.98300 (16)	0.84236 (16)	0.06369 (6)	0.0635 (4)
O4	0.79517 (17)	0.98974 (15)	0.05820 (6)	0.0662 (4)
N1	1.31222 (17)	0.79423 (16)	0.02637 (7)	0.0513 (4)
N2	1.67263 (18)	0.53691 (18)	0.05771 (7)	0.0564 (4)
C1	0.8638 (2)	0.8943 (2)	0.08022 (9)	0.0531 (5)
C2	0.8981 (2)	0.8279 (2)	−0.06917 (9)	0.0535 (5)
C3	0.8268 (2)	0.7505 (2)	−0.11421 (8)	0.0508 (5)
C4	0.8823 (3)	0.6275 (2)	−0.13030 (9)	0.0609 (6)
H4	0.9639	0.5903	−0.1121	0.073*
C5	0.8182 (3)	0.5598 (3)	−0.17289 (10)	0.0756 (7)
H5	0.8576	0.4774	−0.1832	0.091*
C6	0.6971 (4)	0.6111 (3)	−0.20062 (12)	0.0881 (8)
C7	0.6411 (3)	0.7325 (3)	−0.18418 (12)	0.0934 (9)
H7	0.5589	0.7689	−0.2023	0.112*
C8	0.7040 (3)	0.8013 (3)	−0.14147 (10)	0.0724 (6)
H8	0.6632	0.8828	−0.1309	0.087*
C9	0.8005 (2)	0.8393 (2)	0.13138 (8)	0.0540 (5)
C10	0.6700 (3)	0.8879 (3)	0.15302 (11)	0.0788 (7)
H10	0.6151	0.9527	0.1344	0.095*
C11	0.6197 (3)	0.8414 (3)	0.20207 (12)	0.0911 (9)
H11	0.5312	0.8757	0.2159	0.109*
C12	0.6974 (3)	0.7456 (3)	0.23093 (10)	0.0764 (7)
C13	0.8222 (3)	0.6931 (3)	0.20795 (10)	0.0796 (7)
H13	0.8736	0.6245	0.2256	0.096*
C14	0.8740 (3)	0.7392 (3)	0.15917 (9)	0.0699 (6)
H14	0.9603	0.7019	0.1448	0.084*
C15	1.4414 (2)	0.8023 (2)	−0.00023 (9)	0.0560 (5)
H15	1.4486	0.8667	−0.0273	0.067*
C16	1.5632 (2)	0.7230 (2)	0.00943 (9)	0.0558 (5)
H16	1.6499	0.7354	−0.0104	0.067*
C17	1.5585 (2)	0.62332 (19)	0.04898 (8)	0.0483 (5)
C18	1.4256 (2)	0.6191 (2)	0.07871 (9)	0.0612 (6)
H18	1.4165	0.5590	0.1072	0.073*
C19	1.3102 (2)	0.7026 (2)	0.06594 (9)	0.0626 (6)
H19	1.2234	0.6955	0.0862	0.075*
C20	1.6662 (3)	0.4385 (3)	0.10068 (11)	0.0752 (7)
H20A	1.6706	0.4833	0.1350	0.113*
H20B	1.7495	0.3781	0.0978	0.113*
H20C	1.5743	0.3889	0.0977	0.113*
C21	1.8086 (2)	0.5430 (2)	0.02665 (10)	0.0648 (6)
H21A	1.7837	0.5548	−0.0109	0.097*
H21B	1.8637	0.4611	0.0313	0.097*
H21C	1.8685	0.6172	0.0389	0.097*
C22	0.6270 (6)	0.5356 (5)	−0.24752 (17)	0.166 (2)
H22A	0.6512	0.5800	−0.2807	0.249*
H22B	0.5203	0.5335	−0.2434	0.249*
H22C	0.6651	0.4456	−0.2482	0.249*
C23	0.6490 (4)	0.7010 (4)	0.28691 (11)	0.1126 (12)
H23A	0.6595	0.6054	0.2900	0.169*
H23B	0.5463	0.7254	0.2923	0.169*
H23C	0.7108	0.7440	0.3138	0.169*

	U11	U22	U33	U12	U13	U23
Zn1	0.04359 (14)	0.04260 (15)	0.06657 (18)	0.00739 (9)	0.00287 (10)	−0.00171 (11)
O1	0.0702 (10)	0.0516 (9)	0.0817 (11)	0.0032 (7)	−0.0006 (8)	−0.0136 (8)
O2	0.0597 (9)	0.0620 (10)	0.0741 (10)	0.0013 (7)	−0.0071 (8)	−0.0082 (8)
O3	0.0556 (9)	0.0614 (9)	0.0738 (10)	0.0026 (7)	0.0160 (7)	0.0037 (8)
O4	0.0654 (9)	0.0570 (9)	0.0766 (10)	0.0070 (7)	0.0126 (8)	0.0074 (8)
N1	0.0447 (9)	0.0450 (9)	0.0641 (10)	0.0063 (7)	0.0043 (8)	0.0011 (8)
N2	0.0457 (9)	0.0522 (10)	0.0712 (11)	0.0056 (8)	−0.0056 (8)	0.0082 (9)
C1	0.0511 (11)	0.0467 (12)	0.0616 (13)	−0.0043 (9)	0.0032 (10)	−0.0070 (10)
C2	0.0528 (12)	0.0482 (12)	0.0598 (12)	−0.0067 (9)	0.0100 (10)	−0.0005 (10)
C3	0.0499 (11)	0.0485 (11)	0.0540 (11)	−0.0045 (9)	0.0080 (9)	0.0017 (9)
C4	0.0607 (13)	0.0546 (13)	0.0676 (14)	0.0030 (10)	0.0008 (11)	−0.0032 (11)
C5	0.0865 (18)	0.0614 (15)	0.0790 (17)	0.0038 (13)	0.0002 (14)	−0.0168 (13)
C6	0.098 (2)	0.085 (2)	0.0801 (18)	−0.0004 (16)	−0.0184 (16)	−0.0201 (15)
C7	0.092 (2)	0.094 (2)	0.094 (2)	0.0121 (16)	−0.0355 (16)	−0.0111 (17)
C8	0.0743 (15)	0.0655 (15)	0.0772 (16)	0.0103 (12)	−0.0059 (13)	−0.0044 (13)
C9	0.0538 (11)	0.0495 (12)	0.0587 (12)	−0.0059 (9)	0.0051 (10)	−0.0104 (10)
C10	0.0797 (17)	0.0779 (18)	0.0793 (17)	0.0133 (13)	0.0220 (14)	0.0023 (14)
C11	0.0867 (19)	0.099 (2)	0.088 (2)	0.0087 (17)	0.0367 (16)	−0.0091 (18)
C12	0.0894 (19)	0.0836 (18)	0.0564 (14)	−0.0188 (15)	0.0126 (13)	−0.0142 (14)
C13	0.0849 (18)	0.0905 (19)	0.0635 (15)	−0.0005 (15)	0.0011 (13)	0.0089 (14)
C14	0.0683 (14)	0.0770 (16)	0.0646 (14)	0.0052 (12)	0.0088 (11)	0.0022 (13)
C15	0.0511 (11)	0.0451 (11)	0.0720 (14)	0.0026 (9)	0.0079 (10)	0.0118 (10)
C16	0.0430 (10)	0.0507 (12)	0.0738 (14)	0.0031 (9)	0.0099 (9)	0.0090 (11)
C17	0.0431 (10)	0.0436 (11)	0.0582 (12)	−0.0005 (8)	−0.0043 (9)	−0.0020 (9)
C18	0.0523 (12)	0.0662 (14)	0.0651 (14)	0.0066 (10)	0.0034 (10)	0.0185 (11)
C19	0.0475 (11)	0.0728 (15)	0.0679 (14)	0.0083 (10)	0.0120 (10)	0.0096 (12)
C20	0.0672 (15)	0.0716 (16)	0.0866 (17)	0.0099 (12)	−0.0103 (13)	0.0199 (14)
C21	0.0490 (12)	0.0591 (13)	0.0863 (16)	0.0112 (10)	0.0010 (11)	−0.0007 (12)
C22	0.186 (5)	0.159 (4)	0.150 (4)	0.019 (3)	−0.084 (3)	−0.075 (3)
C23	0.145 (3)	0.133 (3)	0.0599 (16)	−0.024 (2)	0.0253 (18)	−0.0083 (18)

Zn1—Zn1i	3.0287 (6)	C12—C13	1.362 (4)
Zn1—O1i	2.0564 (16)	C12—C23	1.523 (4)
Zn1—O4i	2.0320 (16)	C13—C14	1.377 (3)
O1—Zn1i	2.0564 (16)	C13—H13	0.9300
O2—Zn1	2.0626 (15)	C14—H14	0.9300
O3—Zn1	2.0438 (15)	C15—N1	1.337 (3)
O4—Zn1i	2.0320 (16)	C15—C16	1.365 (3)
N1—Zn1	2.0160 (16)	C15—H15	0.9300
C1—O4	1.253 (2)	C16—C17	1.396 (3)
C1—O3	1.256 (2)	C16—H16	0.9300
C1—C9	1.497 (3)	C17—N2	1.350 (2)
C2—O1	1.252 (3)	C17—C18	1.404 (3)
C2—O2	1.255 (3)	C18—C19	1.359 (3)
C2—C3	1.492 (3)	C18—H18	0.9300
C3—C8	1.378 (3)	C19—N1	1.340 (3)
C3—C4	1.383 (3)	C19—H19	0.9300
C4—C5	1.372 (3)	C20—N2	1.449 (3)
C4—H4	0.9300	C20—H20A	0.9600
C5—C6	1.373 (4)	C20—H20B	0.9600
C5—H5	0.9300	C20—H20C	0.9600
C6—C7	1.373 (4)	C21—N2	1.446 (3)
C6—C22	1.513 (4)	C21—H21A	0.9600
C7—C8	1.375 (4)	C21—H21B	0.9600
C7—H7	0.9300	C21—H21C	0.9600
C8—H8	0.9300	C22—H22A	0.9600
C9—C14	1.375 (3)	C22—H22B	0.9600
C9—C10	1.376 (3)	C22—H22C	0.9600
C10—C11	1.379 (4)	C23—H23A	0.9600
C10—H10	0.9300	C23—H23B	0.9600
C11—C12	1.376 (4)	C23—H23C	0.9600
C11—H11	0.9300
O1i—Zn1—Zn1i	71.24 (5)	C9—C10—H10	119.7
O1i—Zn1—O2	157.33 (6)	C11—C10—H10	119.7
O2—Zn1—Zn1i	86.09 (5)	C12—C11—C10	121.5 (3)
O3—Zn1—Zn1i	76.09 (5)	C12—C11—H11	119.2
O3—Zn1—O1i	86.16 (7)	C10—C11—H11	119.2
O3—Zn1—O2	88.75 (6)	C13—C12—C11	117.4 (2)
O4i—Zn1—Zn1i	81.30 (5)	C13—C12—C23	120.6 (3)
O4i—Zn1—O1i	89.51 (7)	C11—C12—C23	121.9 (3)
O4i—Zn1—O2	86.67 (7)	C12—C13—C14	121.5 (3)
O4i—Zn1—O3	157.18 (6)	C12—C13—H13	119.2
N1—Zn1—Zn1i	169.82 (5)	C14—C13—H13	119.2
N1—Zn1—O1i	99.01 (7)	C9—C14—C13	121.2 (2)
N1—Zn1—O2	103.64 (7)	C9—C14—H14	119.4
N1—Zn1—O3	100.83 (7)	C13—C14—H14	119.4
N1—Zn1—O4i	101.98 (7)	N1—C15—C16	124.71 (19)
C2—O1—Zn1i	138.60 (15)	N1—C15—H15	117.6
C2—O2—Zn1	118.06 (14)	C16—C15—H15	117.6
C1—O3—Zn1	131.15 (15)	C15—C16—C17	120.32 (19)
C1—O4—Zn1i	125.07 (14)	C15—C16—H16	119.8
C15—N1—C19	114.85 (17)	C17—C16—H16	119.8
C15—N1—Zn1	122.82 (14)	N2—C17—C16	122.49 (18)
C19—N1—Zn1	122.25 (13)	N2—C17—C18	122.56 (19)
C17—N2—C21	121.69 (18)	C16—C17—C18	114.95 (18)
C17—N2—C20	120.89 (18)	C19—C18—C17	120.2 (2)
C21—N2—C20	117.35 (18)	C19—C18—H18	119.9
O4—C1—O3	125.7 (2)	C17—C18—H18	119.9
O4—C1—C9	117.31 (19)	N1—C19—C18	124.83 (19)
O3—C1—C9	117.00 (19)	N1—C19—H19	117.6
O1—C2—O2	125.5 (2)	C18—C19—H19	117.6
O1—C2—C3	116.2 (2)	N2—C20—H20A	109.5
O2—C2—C3	118.28 (19)	N2—C20—H20B	109.5
C8—C3—C4	118.0 (2)	H20A—C20—H20B	109.5
C8—C3—C2	120.5 (2)	N2—C20—H20C	109.5
C4—C3—C2	121.5 (2)	H20A—C20—H20C	109.5
C5—C4—C3	120.7 (2)	H20B—C20—H20C	109.5
C5—C4—H4	119.7	N2—C21—H21A	109.5
C3—C4—H4	119.7	N2—C21—H21B	109.5
C4—C5—C6	121.4 (2)	H21A—C21—H21B	109.5
C4—C5—H5	119.3	N2—C21—H21C	109.5
C6—C5—H5	119.3	H21A—C21—H21C	109.5
C7—C6—C5	117.9 (3)	H21B—C21—H21C	109.5
C7—C6—C22	121.1 (3)	C6—C22—H22A	109.5
C5—C6—C22	121.0 (3)	C6—C22—H22B	109.5
C6—C7—C8	121.4 (3)	H22A—C22—H22B	109.5
C6—C7—H7	119.3	C6—C22—H22C	109.5
C8—C7—H7	119.3	H22A—C22—H22C	109.5
C7—C8—C3	120.7 (2)	H22B—C22—H22C	109.5
C7—C8—H8	119.7	C12—C23—H23A	109.5
C3—C8—H8	119.7	C12—C23—H23B	109.5
C14—C9—C10	117.6 (2)	H23A—C23—H23B	109.5
C14—C9—C1	120.44 (19)	C12—C23—H23C	109.5
C10—C9—C1	122.0 (2)	H23A—C23—H23C	109.5
C9—C10—C11	120.7 (3)	H23B—C23—H23C	109.5
O1—C2—C3—C8	6.7 (3)	C16—C15—N1—Zn1	−174.77 (17)
O2—C2—C3—C8	−172.9 (2)	C18—C19—N1—C15	−1.8 (3)
O1—C2—C3—C4	−174.11 (19)	C18—C19—N1—Zn1	174.94 (19)
O2—C2—C3—C4	6.3 (3)	C16—C17—N2—C21	0.5 (3)
C8—C3—C4—C5	1.3 (3)	C18—C17—N2—C21	−180.0 (2)
C2—C3—C4—C5	−177.9 (2)	C16—C17—N2—C20	177.3 (2)
C3—C4—C5—C6	−0.4 (4)	C18—C17—N2—C20	−3.2 (3)
C4—C5—C6—C7	−0.4 (5)	O2—C2—O1—Zn1i	9.7 (4)
C4—C5—C6—C22	−179.9 (3)	C3—C2—O1—Zn1i	−169.87 (15)
C5—C6—C7—C8	0.2 (5)	O1—C2—O2—Zn1	−7.3 (3)
C22—C6—C7—C8	179.8 (4)	C3—C2—O2—Zn1	172.26 (13)
C6—C7—C8—C3	0.7 (5)	O4—C1—O3—Zn1	11.8 (3)
C4—C3—C8—C7	−1.5 (4)	C9—C1—O3—Zn1	−166.70 (13)
C2—C3—C8—C7	177.8 (2)	O3—C1—O4—Zn1i	−5.9 (3)
O4—C1—C9—C14	−176.7 (2)	C9—C1—O4—Zn1i	172.51 (13)
O3—C1—C9—C14	1.9 (3)	C15—N1—Zn1—O4i	0.20 (17)
O4—C1—C9—C10	1.8 (3)	C19—N1—Zn1—O4i	−176.33 (16)
O3—C1—C9—C10	−179.6 (2)	C15—N1—Zn1—O3	−179.00 (16)
C14—C9—C10—C11	2.9 (4)	C19—N1—Zn1—O3	4.47 (18)
C1—C9—C10—C11	−175.6 (2)	C15—N1—Zn1—O1i	−91.22 (17)
C9—C10—C11—C12	0.0 (5)	C19—N1—Zn1—O1i	92.25 (17)
C10—C11—C12—C13	−3.3 (5)	C15—N1—Zn1—O2	89.65 (17)
C10—C11—C12—C23	175.5 (3)	C19—N1—Zn1—O2	−86.88 (17)
C11—C12—C13—C14	3.7 (4)	C15—N1—Zn1—Zn1i	−107.6 (3)
C23—C12—C13—C14	−175.1 (3)	C19—N1—Zn1—Zn1i	75.8 (3)
C10—C9—C14—C13	−2.6 (4)	C1—O3—Zn1—N1	161.67 (19)
C1—C9—C14—C13	176.0 (2)	C1—O3—Zn1—O4i	−16.3 (3)
C12—C13—C14—C9	−0.8 (4)	C1—O3—Zn1—O1i	63.22 (19)
N1—C15—C16—C17	0.9 (3)	C1—O3—Zn1—O2	−94.7 (2)
C15—C16—C17—N2	175.8 (2)	C1—O3—Zn1—Zn1i	−8.39 (18)
C15—C16—C17—C18	−3.8 (3)	C2—O2—Zn1—N1	−179.95 (14)
N2—C17—C18—C19	−175.6 (2)	C2—O2—Zn1—O4i	−78.43 (16)
C16—C17—C18—C19	3.9 (3)	C2—O2—Zn1—O3	79.21 (15)
C17—C18—C19—N1	−1.2 (4)	C2—O2—Zn1—O1i	2.3 (3)
C16—C15—N1—C19	2.0 (3)	C2—O2—Zn1—Zn1i	3.07 (15)

D—H···A	D—H	H···A	D···A	D—H···A
C21—H21C···O3ii	0.96	2.54	3.484 (3)	168
C23—H23B···Cg1iii	0.96	2.99	3.925 (4)	165

O1—Zn1i	2.0564 (16)
O2—Zn1	2.0626 (15)
O3—Zn1	2.0438 (15)
O4—Zn1i	2.0320 (16)
N1—Zn1	2.0160 (16)

O3—Zn1—O1i	86.16 (7)
O3—Zn1—O2	88.75 (6)
O4i—Zn1—O1i	89.51 (7)
O4i—Zn1—O2	86.67 (7)
O4i—Zn1—O3	157.18 (6)
N1—Zn1—O1i	99.01 (7)
N1—Zn1—O2	103.64 (7)
N1—Zn1—O3	100.83 (7)
N1—Zn1—O4i	101.98 (7)

Symmetry code: (i) .

Table 2

Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C21—H21C⋯O3ii	0.96	2.54	3.484 (3)	168
C23—H23B⋯Cg1iii	0.96	2.99	3.925 (4)	165

Symmetry codes: (ii) ; (iii) . Cg1 is the centroid of atoms C3–C8.