Bis(μ-phenyl­methano­lato)bis­({4-[(E)-(4-tert-butyl­phen­yl)(2-pyrid­ylmethyl­imino)meth­yl]-3-methyl-1-phenyl-1H-pyrazol-5-olato}zinc(II))

Hsiao, M.-W.; Lin, C.-C.

doi:10.1107/S1600536809024544

metal-organic compounds

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ISSN: 2056-9890

Volume 65| Part 8| August 2009| Pages m864-m865

doi:10.1107/S1600536809024544

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Bis(μ-phenylmethanolato)bis({4-[(E)-(4-tert-butylphenyl)(2-pyridylmethylimino)methyl]-3-methyl-1-phenyl-1H-pyrazol-5-olato}zinc(II))

Mon-Wei Hsiao ^a and Chu-Chieh Lin ^a ^*

^aDepartment of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, Republic of China
^*Correspondence e-mail: cchlin@mail.nchu.edu.tw

(Received 24 June 2009; accepted 26 June 2009; online 4 July 2009)

In the title centrosymmetric dimeric Zn^II complex, [Zn₂(C₂₇H₂₇N₄O)₂(C₇H₇O)₂], the Zn^II center is coordinated by two N atoms and one O atom of the ketiminate ligand and two bridging O atoms of the benzylalkoxy groups. The geometry around the Zn^II ions is distorted trigonal-bipyramidal.

Related literature

For the potential applications of polyesters, see: Gref et al. (1994 ); Jeong et al. (1997 ). Many zinc complexes with various ligands are effective initiators/catalysts for the ring-opening polymerization (ROP) of cyclic esters, see: Chamberlain et al. (2001 ); Williams et al. (2003 ); Dechy-Cabaret et al. (2004 ); Chen et al. (2005 ); Wu et al. (2006 ); Huang et al. (2009 ); Hung et al. (2008 ). Tripodal tridentate ligand-supported zinc complexes have been used for the polymerization of lactides, see: Chisholm et al. (2000 ). Recently, a series of zinc alkoxides (Yu et al., 2002 ; Lee et al., 2007 ) coordinated with simple N,N,O-tridentate ketiminate ligands has been synthesized and these derivatives showed highly catalytic activity with regard to the ROP of lactides. For Zn—O and Zn—N distances in other zinc ketiminate complexes, see: Hung & Lin (2009 ).

Experimental

Crystal data

[Zn₂(C₂₇H₂₇N₄O)₂(C₇H₇O)₂]
M_r = 1192.04
Triclinic, $[P \overline 1]$
a = 9.0873 (15) Å
b = 13.363 (2) Å
c = 13.397 (2) Å
α = 72.206 (3)°
β = 74.018 (3)°
γ = 88.664 (3)°
V = 1485.9 (4) Å³
Z = 1
Mo Kα radiation
μ = 0.86 mm⁻¹
T = 293 K
0.41 × 0.32 × 0.25 mm

Data collection

Bruker SMART 1000 CCD diffractometer
Absorption correction: multi-scan (SADABS; Sheldrick, 1996 ) T_min = 0.719, T_max = 0.813
8258 measured reflections
5792 independent reflections
4450 reflections with I > 2σ(I)
R_int = 0.031

Refinement

R[F² > 2σ(F²)] = 0.048
wR(F²) = 0.137
S = 1.01
5792 reflections
370 parameters
H-atom parameters constrained
Δρ_max = 0.58 e Å⁻³
Δρ_min = −0.44 e Å⁻³

Data collection: SMART (Bruker, 1999 ); cell refinement: SAINT (Bruker, 1999); 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.

Supporting information

Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536809024544/bt2979sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536809024544/bt2979Isup2.hkl

checkCIF report

Comment top

Polyesters such as poly(ε-caprolactone) (PCL) and poly(lactide) (PLA) and their copolymers have attracted intensive attention due to their potential applications in many fields (Gref et al.,1994; Jeong et al., 1997). The major polymerization methods for these polymers are the ring-opening polymerization (ROP) of cyclic esters. Many zinc complexes with various ligands were effective initiator/catalyst for the ROP of cyclic esters (Chamberlain et al., 2001; Williams et al., 2003; Dechy-Cabaret et al. 2004, Chen, et al., 2005; Wu, et al., 2006; Hung et al., 2008, 2009). Tripodal tridentate ligand supported zinc complexes have been synthesized and used for the polymerization of lactides and the polymerization is living with relatively low polydispersities (Chisholm et al., 2000). Recently, a series of zinc alkoxides (Yu, et al., 2002; Lee, et al., 2007) coordinated with simple NNO-tridentate ketiminate ligands has been synthesized and these derivatives showed highly catalytic activity with regard to the ROP of lactides. However, these complexes had no (or little) stereoselectivities for the polymerization of rac-lactides. In order to obtain catalytic activity as well as enhance stereoselectivity of the corresponding metal alkoxides, we (Huang, et al., 2009) have developed a unsymmetric NNO-ketiminate system derived from 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one. In the presence of pyrazole fused a chelating arm, the metal derivatives can be stabilized by an extensive π-conjugate system. In this study, we reported the synthesis and crystal structure of [LZn(µ-OBn)]₂, where L and benzyloxy are the NNO-tridentate ketiminate ligand and benzylalkoxy group, respectively.

This solid structure of [LZn(µ-OBn)]₂ reveals a dimeric Zn^II complex in which the zinc center is coordinated to N,N,O atoms of the ketiminate ligand and two bridging oxygen atoms of the benzylalkoxy groups. The geometry around the zinc ion is a distorted trigonal bipyramid with τ = 0.51 and atoms O(1), O(2), and N(3) sitting on the equatorial positions. The bond distances between zinc and the coordinated atoms of Zn—O(2) 1.999 (2); Zn—O(1) 2.0137 (19); Zn—O(2 A) 2.0254 (17); Zn—N(3) 2.092 (2); and Zn—N(4) 2.115 (2) are compatible with the Zn—O and Zn—N distances found in other zinc ketiminate complexes (Huang et al., 2009).

Related literature top

For the potential applications of polyesters, see: Gref et al. (1994); Jeong et al. (1997). Many zinc complexes with various ligands are effective initiator/catalyst for the ring-opening polymerization (ROP) of cyclic esters, see: Chamberlain et al. (2001); Williams et al. (2003); Dechy-Cabaret et al. (2004); Chen et al. (2005); Wu et al. (2006); Huang et al. (2009); Hung et al. (2008). Tripodal tridentate ligand-supported zinc complexes have been used for the polymerization of lactides, see: Chisholm et al. (2000). Recently, a series of zinc alkoxides (Yu, et al., 2002; Lee, et al., 2007) coordinated with simple N,N,O-tridentate ketiminate ligands has been synthesized and these derivatives showed highly catalytic activity with regard to the ROP of lactides. For Zn—O and Zn—N distances in other zinc ketiminate complexes, see: Hung & Lin (2009).

Experimental top

The ligand, (4Z)-4-{[(pyridin-2-yl)methylamino](4-tert-butylphenyl)methylene}-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one (L—H) was prepared by the following procedures. 2-(Aminomethyl)pyridine (1.03 ml, 10.0 mmol) and 4-[(4-tert-butylphenyl)carbonyl]-3-methyl-1-phenyl-4,5-dihydro-1H-pyrazol-5-one (3.34 g, 10.0 mmol) were refluxed in ethanol (40 ml) for 24 h. The volatile materials were removed in under vacuum to produce yellow powder. The powder was then dissolved in hot ethanol (30 ml) and cooled to -18°C for 24 h giving yellow crystals.

The title complex was synthesized by the following procedures. Diethylzinc (2.2 ml, 1.0 M in hexane, 2.2 mmol) was slowly added to a suspension of L—H (0.85 g, 2.0 mmol) in toluene (40 ml). The mixture was stirred at 0°C for 3 h and the volatile materials were removed in under vacuum to yield white powder. The powder was dissolved in toluene (40 ml), and then benzyl alcohol (0.21 ml, 2.0 mmol) was added at 0°C. Continuously stirring at 0°C for another 3 h, the mixture initially turned colorless and then into white turbid. After filtration and washing with cooled toluene three times, a white powder was obtained. The resulting powder was recrystallized with a mixted dichloromathane and hexane solution to yield white crystals.

Computing details top

Data collection: SMART (Bruker, 1999); cell refinement: SAINT (Bruker, 1999); data reduction: SAINT (Bruker, 1999); 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 (Sheldrick, 2008).

Figures top

Fig. 1. A view of the molecular structure of the title compound with displacement ellipsoids shown at the 20% probability level. Symmetry operator (A): 1-x,1-y,2-z.

Bis(µ-phenylmethanolato)bis({4-[(E)-(4-tert-butylphenyl)(2- pyridylmethylimino)methyl]-3-methyl-1-phenyl-1H-pyrazol-5- olato}zinc(II)) top

Crystal data top

[Zn₂(C₂₇H₂₇N₄O)₂(C₇H₇O)₂]	Z = 1
M_r = 1192.04	F(000) = 624
Triclinic, P1	D_x = 1.332 Mg m⁻³
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 9.0873 (15) Å	Cell parameters from 4007 reflections
b = 13.363 (2) Å	θ = 2.3–26.0°
c = 13.397 (2) Å	µ = 0.86 mm⁻¹
α = 72.206 (3)°	T = 293 K
β = 74.018 (3)°	Parallelepiped, white
γ = 88.664 (3)°	0.41 × 0.32 × 0.25 mm
V = 1485.9 (4) Å³

Data collection top

Bruker SMART 1000 CCD diffractometer	5792 independent reflections
Radiation source: fine-focus sealed tube	4450 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.031
ϕ and ω scans	θ_max = 26.1°, θ_min = 1.7°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −11→11
T_min = 0.719, T_max = 0.813	k = −16→14
8258 measured reflections	l = −16→16

Refinement top

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)] = 0.048	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.137	H-atom parameters constrained
S = 1.01	w = 1/[σ²(F_o²) + (0.0902P)²] where P = (F_o² + 2F_c²)/3
5792 reflections	(Δ/σ)_max = 0.001
370 parameters	Δρ_max = 0.58 e Å⁻³
0 restraints	Δρ_min = −0.44 e Å⁻³

Crystal data top

[Zn₂(C₂₇H₂₇N₄O)₂(C₇H₇O)₂]	γ = 88.664 (3)°
M_r = 1192.04	V = 1485.9 (4) Å³
Triclinic, P1	Z = 1
a = 9.0873 (15) Å	Mo Kα radiation
b = 13.363 (2) Å	µ = 0.86 mm⁻¹
c = 13.397 (2) Å	T = 293 K
α = 72.206 (3)°	0.41 × 0.32 × 0.25 mm
β = 74.018 (3)°

Data collection top

Bruker SMART 1000 CCD diffractometer	5792 independent reflections
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	4450 reflections with I > 2σ(I)
T_min = 0.719, T_max = 0.813	R_int = 0.031
8258 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.048	0 restraints
wR(F²) = 0.137	H-atom parameters constrained
S = 1.01	Δρ_max = 0.58 e Å⁻³
5792 reflections	Δρ_min = −0.44 e Å⁻³
370 parameters

Special details top

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 (Å²) top

	x	y	z	U_iso*/U_eq
Zn	0.65973 (4)	0.51056 (2)	0.92949 (2)	0.04217 (14)
O1	0.6604 (2)	0.39430 (15)	0.86285 (14)	0.0471 (5)
O2	0.4651 (2)	0.58125 (14)	0.92139 (14)	0.0427 (5)
N1	0.5943 (3)	0.36547 (18)	0.71795 (17)	0.0414 (5)
N2	0.6169 (3)	0.41391 (19)	0.60618 (18)	0.0479 (6)
N3	0.8186 (3)	0.5971 (2)	0.78379 (19)	0.0502 (6)
N4	0.8045 (3)	0.5874 (2)	0.98662 (19)	0.0510 (6)
C1	0.4996 (3)	0.2706 (2)	0.7697 (2)	0.0445 (7)
C2	0.4698 (5)	0.2198 (3)	0.8796 (3)	0.0766 (12)
H2B	0.5121	0.2468	0.9226	0.092*
C3	0.3759 (6)	0.1277 (4)	0.9260 (3)	0.0979 (17)
H3A	0.3572	0.0926	1.0003	0.118*
C4	0.3106 (5)	0.0875 (3)	0.8657 (3)	0.0866 (13)
H4A	0.2459	0.0266	0.8984	0.104*
C5	0.3417 (5)	0.1382 (3)	0.7558 (3)	0.0741 (11)
H5A	0.2988	0.1109	0.7133	0.089*
C6	0.4359 (4)	0.2295 (3)	0.7076 (3)	0.0557 (8)
H6A	0.4563	0.2633	0.6329	0.067*
C7	0.7005 (3)	0.5016 (2)	0.5823 (2)	0.0420 (6)
C8	0.7365 (3)	0.5136 (2)	0.6750 (2)	0.0397 (6)
C9	0.6646 (3)	0.4231 (2)	0.7623 (2)	0.0388 (6)
C10	0.7436 (4)	0.5707 (3)	0.4660 (2)	0.0585 (8)
H10A	0.7002	0.5397	0.4238	0.088*
H10B	0.8533	0.5779	0.4373	0.088*
H10C	0.7050	0.6388	0.4624	0.088*
C11	0.8166 (3)	0.5975 (2)	0.6870 (2)	0.0401 (6)
C12	0.8939 (3)	0.6863 (2)	0.5875 (2)	0.0415 (6)
C13	1.0346 (4)	0.6780 (2)	0.5185 (2)	0.0527 (8)
H13A	1.0860	0.6169	0.5355	0.063*
C14	1.0994 (4)	0.7592 (3)	0.4250 (2)	0.0543 (8)
H14A	1.1948	0.7519	0.3803	0.065*
C15	1.0275 (3)	0.8518 (2)	0.3950 (2)	0.0449 (7)
C16	0.8896 (4)	0.8605 (2)	0.4664 (2)	0.0507 (7)
H16A	0.8394	0.9224	0.4506	0.061*
C17	0.8241 (3)	0.7793 (2)	0.5609 (2)	0.0488 (7)
H17A	0.7310	0.7878	0.6074	0.059*
C18	1.1010 (4)	0.9370 (3)	0.2872 (2)	0.0528 (8)
C19	1.2569 (4)	0.9755 (3)	0.2883 (3)	0.0788 (12)
H19A	1.2437	1.0052	0.3468	0.118*
H19B	1.3040	1.0282	0.2200	0.118*
H19C	1.3212	0.9174	0.2989	0.118*
C20	1.0036 (5)	1.0308 (3)	0.2664 (3)	0.0740 (11)
H20A	0.9903	1.0621	0.3237	0.111*
H20B	0.9052	1.0079	0.2648	0.111*
H20C	1.0537	1.0818	0.1975	0.111*
C21	1.1214 (5)	0.8895 (3)	0.1935 (3)	0.0781 (12)
H21A	1.0231	0.8645	0.1937	0.117*
H21B	1.1866	0.8319	0.2033	0.117*
H21C	1.1670	0.9424	0.1250	0.117*
C22	0.9139 (4)	0.6774 (3)	0.7947 (3)	0.0656 (10)
H22A	0.8742	0.7459	0.7704	0.079*
H22B	1.0177	0.6796	0.7487	0.079*
C23	0.9158 (3)	0.6541 (2)	0.9110 (2)	0.0471 (7)
C24	1.0260 (4)	0.7008 (3)	0.9383 (3)	0.0596 (8)
H24A	1.1038	0.7462	0.8838	0.072*
C25	1.0206 (4)	0.6803 (3)	1.0458 (3)	0.0723 (11)
H25A	1.0943	0.7111	1.0655	0.087*
C26	0.9044 (5)	0.6135 (4)	1.1235 (3)	0.0837 (13)
H26A	0.8966	0.5987	1.1973	0.100*
C27	0.8007 (5)	0.5690 (3)	1.0911 (3)	0.0770 (12)
H27A	0.7226	0.5232	1.1446	0.092*
C28	0.4663 (4)	0.6915 (2)	0.8848 (2)	0.0480 (7)
H28A	0.5652	0.7207	0.8809	0.058*
H28B	0.3889	0.7142	0.9380	0.058*
C29	0.4367 (3)	0.7360 (2)	0.7741 (2)	0.0403 (6)
C30	0.4252 (3)	0.6741 (2)	0.7107 (2)	0.0487 (7)
H30A	0.4371	0.6022	0.7354	0.058*
C31	0.3960 (4)	0.7178 (3)	0.6106 (3)	0.0654 (10)
H31A	0.3850	0.6749	0.5697	0.078*
C32	0.3834 (5)	0.8241 (4)	0.5718 (3)	0.0781 (12)
H32A	0.3656	0.8536	0.5041	0.094*
C33	0.3972 (5)	0.8868 (3)	0.6333 (3)	0.0729 (11)
H33A	0.3891	0.9590	0.6069	0.087*
C34	0.4229 (4)	0.8433 (3)	0.7342 (2)	0.0534 (8)
H34A	0.4310	0.8864	0.7756	0.064*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Zn	0.0478 (2)	0.0436 (2)	0.02763 (18)	−0.01468 (14)	−0.00437 (13)	−0.00471 (13)
O1	0.0647 (13)	0.0423 (11)	0.0272 (9)	−0.0156 (9)	−0.0091 (9)	−0.0030 (8)
O2	0.0523 (12)	0.0410 (11)	0.0266 (9)	−0.0093 (9)	−0.0090 (8)	0.0000 (8)
N1	0.0531 (14)	0.0391 (12)	0.0267 (11)	−0.0090 (10)	−0.0062 (10)	−0.0066 (9)
N2	0.0598 (16)	0.0497 (14)	0.0302 (12)	−0.0059 (12)	−0.0118 (11)	−0.0069 (10)
N3	0.0580 (15)	0.0508 (14)	0.0328 (12)	−0.0232 (12)	−0.0025 (11)	−0.0077 (11)
N4	0.0551 (15)	0.0541 (15)	0.0392 (13)	−0.0164 (12)	−0.0099 (11)	−0.0095 (11)
C1	0.0483 (16)	0.0417 (15)	0.0385 (15)	−0.0071 (12)	−0.0060 (12)	−0.0101 (12)
C2	0.108 (3)	0.074 (2)	0.0359 (17)	−0.049 (2)	−0.0090 (18)	−0.0065 (16)
C3	0.137 (4)	0.088 (3)	0.046 (2)	−0.065 (3)	−0.010 (2)	0.001 (2)
C4	0.095 (3)	0.078 (3)	0.072 (3)	−0.050 (2)	−0.009 (2)	−0.013 (2)
C5	0.082 (3)	0.073 (2)	0.069 (2)	−0.027 (2)	−0.025 (2)	−0.019 (2)
C6	0.066 (2)	0.0536 (18)	0.0472 (17)	−0.0116 (15)	−0.0185 (15)	−0.0125 (15)
C7	0.0477 (16)	0.0404 (15)	0.0321 (13)	−0.0004 (12)	−0.0072 (12)	−0.0063 (12)
C8	0.0460 (15)	0.0356 (14)	0.0291 (13)	−0.0032 (11)	−0.0034 (11)	−0.0042 (11)
C9	0.0429 (15)	0.0360 (14)	0.0320 (13)	−0.0025 (11)	−0.0036 (11)	−0.0084 (11)
C10	0.081 (2)	0.0513 (18)	0.0347 (15)	−0.0091 (16)	−0.0180 (15)	0.0010 (14)
C11	0.0387 (14)	0.0379 (14)	0.0339 (14)	−0.0030 (11)	−0.0021 (11)	−0.0042 (11)
C12	0.0433 (15)	0.0399 (15)	0.0323 (13)	−0.0091 (12)	−0.0024 (11)	−0.0050 (11)
C13	0.0492 (17)	0.0459 (17)	0.0440 (16)	0.0024 (13)	0.0039 (13)	−0.0022 (14)
C14	0.0409 (16)	0.0532 (18)	0.0461 (17)	0.0005 (13)	0.0096 (13)	−0.0025 (14)
C15	0.0422 (15)	0.0438 (16)	0.0377 (15)	−0.0102 (12)	−0.0051 (12)	−0.0016 (12)
C16	0.0544 (18)	0.0388 (16)	0.0455 (17)	−0.0009 (13)	−0.0050 (14)	−0.0018 (13)
C17	0.0427 (16)	0.0471 (17)	0.0430 (16)	−0.0017 (13)	0.0042 (13)	−0.0088 (13)
C18	0.0507 (17)	0.0523 (18)	0.0417 (16)	−0.0163 (14)	−0.0078 (13)	0.0017 (14)
C19	0.060 (2)	0.083 (3)	0.066 (2)	−0.034 (2)	−0.0106 (18)	0.013 (2)
C20	0.077 (3)	0.053 (2)	0.067 (2)	−0.0181 (18)	−0.015 (2)	0.0134 (18)
C21	0.094 (3)	0.081 (3)	0.0379 (18)	−0.019 (2)	−0.0038 (18)	0.0005 (18)
C22	0.077 (2)	0.063 (2)	0.0444 (17)	−0.0382 (18)	−0.0040 (16)	−0.0076 (16)
C23	0.0465 (16)	0.0455 (16)	0.0438 (16)	−0.0097 (13)	−0.0053 (13)	−0.0118 (13)
C24	0.0512 (19)	0.061 (2)	0.063 (2)	−0.0147 (15)	−0.0099 (16)	−0.0178 (17)
C25	0.068 (2)	0.086 (3)	0.073 (2)	−0.013 (2)	−0.034 (2)	−0.026 (2)
C26	0.100 (3)	0.102 (3)	0.053 (2)	−0.030 (3)	−0.032 (2)	−0.018 (2)
C27	0.091 (3)	0.091 (3)	0.0382 (18)	−0.039 (2)	−0.0133 (18)	−0.0074 (18)
C28	0.0621 (19)	0.0452 (16)	0.0309 (14)	−0.0088 (14)	−0.0118 (13)	−0.0040 (12)
C29	0.0336 (14)	0.0458 (15)	0.0309 (13)	−0.0058 (11)	−0.0021 (11)	−0.0025 (11)
C30	0.0511 (17)	0.0510 (17)	0.0347 (14)	−0.0074 (13)	−0.0073 (13)	−0.0037 (13)
C31	0.073 (2)	0.082 (3)	0.0418 (18)	−0.0075 (19)	−0.0205 (17)	−0.0154 (18)
C32	0.088 (3)	0.095 (3)	0.045 (2)	0.007 (2)	−0.032 (2)	0.000 (2)
C33	0.088 (3)	0.057 (2)	0.055 (2)	0.0158 (19)	−0.0182 (19)	0.0073 (17)
C34	0.0531 (18)	0.0544 (19)	0.0442 (17)	0.0009 (14)	−0.0103 (14)	−0.0062 (14)

Geometric parameters (Å, º) top

Zn—O2	1.999 (2)	C15—C16	1.379 (4)
Zn—O1	2.0137 (19)	C15—C18	1.526 (4)
Zn—O2ⁱ	2.0253 (17)	C16—C17	1.382 (4)
Zn—N3	2.092 (2)	C16—H16A	0.9300
Zn—N4	2.114 (2)	C17—H17A	0.9300
Zn—Znⁱ	2.9612 (8)	C18—C20	1.518 (5)
O1—C9	1.272 (3)	C18—C19	1.523 (5)
O2—C28	1.403 (3)	C18—C21	1.539 (5)
O2—Znⁱ	2.0253 (17)	C19—H19A	0.9600
N1—C9	1.367 (3)	C19—H19B	0.9600
N1—N2	1.396 (3)	C19—H19C	0.9600
N1—C1	1.419 (3)	C20—H20A	0.9600
N2—C7	1.315 (4)	C20—H20B	0.9600
N3—C11	1.300 (4)	C20—H20C	0.9600
N3—C22	1.460 (4)	C21—H21A	0.9600
N4—C23	1.329 (4)	C21—H21B	0.9600
N4—C27	1.335 (4)	C21—H21C	0.9600
C1—C2	1.372 (4)	C22—C23	1.498 (4)
C1—C6	1.374 (4)	C22—H22A	0.9700
C2—C3	1.384 (5)	C22—H22B	0.9700
C2—H2B	0.9300	C23—C24	1.377 (4)
C3—C4	1.355 (5)	C24—C25	1.368 (5)
C3—H3A	0.9300	C24—H24A	0.9300
C4—C5	1.370 (5)	C25—C26	1.366 (5)
C4—H4A	0.9300	C25—H25A	0.9300
C5—C6	1.378 (5)	C26—C27	1.356 (5)
C5—H5A	0.9300	C26—H26A	0.9300
C6—H6A	0.9300	C27—H27A	0.9300
C7—C8	1.423 (4)	C28—C29	1.516 (4)
C7—C10	1.495 (4)	C28—H28A	0.9700
C8—C9	1.418 (4)	C28—H28B	0.9700
C8—C11	1.422 (4)	C29—C30	1.378 (4)
C10—H10A	0.9600	C29—C34	1.385 (4)
C10—H10B	0.9600	C30—C31	1.386 (4)
C10—H10C	0.9600	C30—H30A	0.9300
C11—C12	1.495 (3)	C31—C32	1.369 (6)
C12—C17	1.375 (4)	C31—H31A	0.9300
C12—C13	1.381 (4)	C32—C33	1.370 (6)
C13—C14	1.374 (4)	C32—H32A	0.9300
C13—H13A	0.9300	C33—C34	1.380 (5)
C14—C15	1.386 (4)	C33—H33A	0.9300
C14—H14A	0.9300	C34—H34A	0.9300

O2—Zn—O1	105.69 (8)	C14—C15—C18	119.9 (3)
O2—Zn—O2ⁱ	85.26 (8)	C15—C16—C17	121.4 (3)
O1—Zn—O2ⁱ	92.46 (7)	C15—C16—H16A	119.3
O2—Zn—N3	103.26 (9)	C17—C16—H16A	119.3
O1—Zn—N3	87.87 (9)	C12—C17—C16	121.3 (3)
O2ⁱ—Zn—N3	171.07 (9)	C12—C17—H17A	119.3
O2—Zn—N4	113.40 (10)	C16—C17—H17A	119.3
O1—Zn—N4	140.49 (10)	C15—C18—C20	112.5 (3)
O2ⁱ—Zn—N4	96.22 (8)	C15—C18—C19	109.5 (3)
N3—Zn—N4	78.03 (9)	C20—C18—C19	108.5 (3)
O2—Zn—Znⁱ	42.97 (5)	C15—C18—C21	108.6 (3)
O1—Zn—Znⁱ	102.23 (6)	C20—C18—C21	108.1 (3)
O2ⁱ—Zn—Znⁱ	42.29 (6)	C19—C18—C21	109.7 (3)
N3—Zn—Znⁱ	146.15 (8)	C18—C19—H19A	109.5
N4—Zn—Znⁱ	110.01 (7)	C18—C19—H19B	109.5
C9—O1—Zn	116.06 (17)	H19A—C19—H19B	109.5
C28—O2—Zn	120.26 (18)	C18—C19—H19C	109.5
C28—O2—Znⁱ	124.18 (17)	H19A—C19—H19C	109.5
Zn—O2—Znⁱ	94.74 (8)	H19B—C19—H19C	109.5
C9—N1—N2	111.9 (2)	C18—C20—H20A	109.5
C9—N1—C1	129.6 (2)	C18—C20—H20B	109.5
N2—N1—C1	118.4 (2)	H20A—C20—H20B	109.5
C7—N2—N1	105.2 (2)	C18—C20—H20C	109.5
C11—N3—C22	119.5 (2)	H20A—C20—H20C	109.5
C11—N3—Zn	124.61 (19)	H20B—C20—H20C	109.5
C22—N3—Zn	114.56 (19)	C18—C21—H21A	109.5
C23—N4—C27	117.6 (3)	C18—C21—H21B	109.5
C23—N4—Zn	116.6 (2)	H21A—C21—H21B	109.5
C27—N4—Zn	125.7 (2)	C18—C21—H21C	109.5
C2—C1—C6	119.6 (3)	H21A—C21—H21C	109.5
C2—C1—N1	121.6 (3)	H21B—C21—H21C	109.5
C6—C1—N1	118.8 (3)	N3—C22—C23	110.6 (2)
C1—C2—C3	119.2 (3)	N3—C22—H22A	109.5
C1—C2—H2B	120.4	C23—C22—H22A	109.5
C3—C2—H2B	120.4	N3—C22—H22B	109.5
C4—C3—C2	121.6 (4)	C23—C22—H22B	109.5
C4—C3—H3A	119.2	H22A—C22—H22B	108.1
C2—C3—H3A	119.2	N4—C23—C24	121.7 (3)
C3—C4—C5	118.9 (3)	N4—C23—C22	116.7 (3)
C3—C4—H4A	120.5	C24—C23—C22	121.5 (3)
C5—C4—H4A	120.5	C23—C24—C25	119.7 (3)
C4—C5—C6	120.5 (3)	C23—C24—H24A	120.1
C4—C5—H5A	119.7	C25—C24—H24A	120.1
C6—C5—H5A	119.7	C26—C25—C24	118.5 (3)
C1—C6—C5	120.2 (3)	C26—C25—H25A	120.8
C1—C6—H6A	119.9	C24—C25—H25A	120.8
C5—C6—H6A	119.9	C27—C26—C25	118.9 (3)
N2—C7—C8	112.4 (2)	C27—C26—H26A	120.6
N2—C7—C10	117.1 (3)	C25—C26—H26A	120.6
C8—C7—C10	130.5 (3)	N4—C27—C26	123.6 (3)
C7—C8—C9	104.7 (2)	N4—C27—H27A	118.2
C7—C8—C11	131.0 (2)	C26—C27—H27A	118.2
C9—C8—C11	124.2 (2)	O2—C28—C29	114.0 (2)
O1—C9—N1	123.1 (2)	O2—C28—H28A	108.7
O1—C9—C8	131.0 (3)	C29—C28—H28A	108.7
N1—C9—C8	105.8 (2)	O2—C28—H28B	108.7
C7—C10—H10A	109.5	C29—C28—H28B	108.7
C7—C10—H10B	109.5	H28A—C28—H28B	107.6
H10A—C10—H10B	109.5	C30—C29—C34	118.5 (3)
C7—C10—H10C	109.5	C30—C29—C28	122.6 (3)
H10A—C10—H10C	109.5	C34—C29—C28	118.8 (3)
H10B—C10—H10C	109.5	C29—C30—C31	120.7 (3)
N3—C11—C8	119.8 (2)	C29—C30—H30A	119.7
N3—C11—C12	121.1 (3)	C31—C30—H30A	119.7
C8—C11—C12	119.0 (2)	C32—C31—C30	120.2 (4)
C17—C12—C13	117.7 (3)	C32—C31—H31A	119.9
C17—C12—C11	120.3 (3)	C30—C31—H31A	119.9
C13—C12—C11	122.0 (3)	C31—C32—C33	119.7 (3)
C14—C13—C12	120.7 (3)	C31—C32—H32A	120.2
C14—C13—H13A	119.7	C33—C32—H32A	120.2
C12—C13—H13A	119.7	C32—C33—C34	120.4 (3)
C13—C14—C15	122.2 (3)	C32—C33—H33A	119.8
C13—C14—H14A	118.9	C34—C33—H33A	119.8
C15—C14—H14A	118.9	C33—C34—C29	120.5 (3)
C16—C15—C14	116.6 (3)	C33—C34—H34A	119.8
C16—C15—C18	123.5 (3)	C29—C34—H34A	119.8

Symmetry code: (i) −x+1, −y+1, −z+2.

Experimental details

Crystal data
Chemical formula	[Zn₂(C₂₇H₂₇N₄O)₂(C₇H₇O)₂]
M_r	1192.04
Crystal system, space group	Triclinic, P1
Temperature (K)	293
a, b, c (Å)	9.0873 (15), 13.363 (2), 13.397 (2)
α, β, γ (°)	72.206 (3), 74.018 (3), 88.664 (3)
V (Å³)	1485.9 (4)
Z	1
Radiation type	Mo Kα
µ (mm⁻¹)	0.86
Crystal size (mm)	0.41 × 0.32 × 0.25

Data collection
Diffractometer	Bruker SMART 1000 CCD diffractometer
Absorption correction	Multi-scan (SADABS; Sheldrick, 1996)
T_min, T_max	0.719, 0.813
No. of measured, independent and observed [I > 2σ(I)] reflections	8258, 5792, 4450
R_int	0.031
(sin θ/λ)_max (Å⁻¹)	0.619

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.048, 0.137, 1.01
No. of reflections	5792
No. of parameters	370
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.58, −0.44

Computer programs: SMART (Bruker, 1999), SAINT (Bruker, 1999), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).

Acknowledgements

Financial support from National Science Council of the Republic of China is gratefully appreciated. Helpful comments from the reviewers are also greatly appreciated.

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