Crystal structure of (pyridine-κN)bis(quinolin-2-olato-κ(2) N,O)copper(II) monohydrate.

The title complex, [Cu(C9H6NO)2(C5H4N)]·H2O, adopts a slightly distorted square-pyramidal geometry in which the axial pyridine ligand exhibits a long Cu-N bond of 2.305 (3) Å. The pyridine ligand forms dihedral angles of 79.5 (5) and 88.0 (1)° with the planes of the two quinolin-2-olate ligands, while the dihedral angle between the quinoline groups of 9.0 (3)° indicates near planarity. The water mol-ecule connects adjacent copper complexes through O-H⋯O hydrogen bonds to phenolate O atoms, forming a network inter-connecting all the complexes in the crystal lattice.

Related literature

For the biological activity of clioquinol, see: Di Vaira et al. (2004 ▸). For the use of clioquinol in the treatment of Alzheimer’s disease, see: Bareggi & Cornelli (2012 ▸). For crystal structures of copper(II) complexes with 8-hy­droxy­quinoline (8-HQ) derivatives and the metal in a five-coordinate environment, see: Deraeve et al. (2008 ▸). For [Cu(8-HQ)2(H2O)2] with six-coordinate Cu(II), see: Okabe & Saishu (2001 ▸). For copper(II), zinc(II) and iron(III) crystalline complexes with 8-HQ, see: Palenik (1964 ▸); Najafi et al. (2011 ▸); Jian et al. (2001 ▸). For EPR studies performed on a putative [Cu(8-HQ)2(pyri­dine)] complex, see: Marov et al. (1975 ▸, 1978 ▸).

Experimental

Crystal data

[Cu(C9H6NO)2(C5H5N)]·H2O

M = 448.95

Orthorhombic,

a = 8.9129 (4) Å

b = 13.9987 (7) Å

c = 32.2568 (16) Å

V = 4024.6 (3) Å3

Z = 8

Mo Kα radiation

μ = 1.12 mm−1

T = 296 K

0.21 × 0.11 × 0.08 mm

Data collection

Bruker APEXII CCD diffractometer

Absorption correction: multi-scan (SADABS; Bruker, 2002 ▸) T min = 0.800, T max = 0.916

15390 measured reflections

3542 independent reflections

2301 reflections with I > 2σ(I)

R int = 0.050

Refinement

R[F 2 > 2σ(F 2)] = 0.038

wR(F 2) = 0.093

S = 1.01

3542 reflections

279 parameters

H atoms treated by a mixture of independent and constrained refinement

Δρmax = 0.24 e Å−3

Δρmin = −0.27 e Å−3

Data collection: APEX2 (Bruker, 2002 ▸); cell refinement: SAINT (Bruker, 2002 ▸); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▸); program(s) used to refine structure: SHELXL97 (Sheldrick, 2015 ▸); molecular graphics: SHELXTL (Sheldrick, 2008 ▸); software used to prepare material for publication: SHELXTL and publCIF (Westrip, 2010 ▸).

Crystal structure: contains datablock(s) I. DOI: 10.1107/S2056989015001279/jj2192sup1.cif

Structure factors: contains datablock(s) I. DOI: 10.1107/S2056989015001279/jj2192Isup2.hkl

Click here for additional data file.

Supporting information file. DOI: 10.1107/S2056989015001279/jj2192Isup3.cdx

Click here for additional data file.

9 6 2 5 4 2 . DOI: 10.1107/S2056989015001279/jj2192fig1.tif

ORTEP drawing of [Cu(C9H6NO)2(C5H4N]·H2O. Displacement ellipsoids were drawn at the 50% probability level. The hydrogen atoms have been omitted for clarity.

Click here for additional data file.

9 6 2 5 4 2 a b . DOI: 10.1107/S2056989015001279/jj2192fig2.tif

A portion of the mol­ecular packing for [Cu(C9H6NO)2(C5H4N]·H2O viewed along the a axis. Dashed lines indicate O—H⋯O hydrogen bonds between water hydrogen atoms and hy­droxy­quinoline oxygen atoms forming continuous chains along the b axis. Displacement ellipsoids were drawn at the 5% probability level. Hydrogen atoms not involved in hydrogen bonds have been omitted for clarity.

CCDC reference: 1044628

Additional supporting information: crystallographic information; 3D view; checkCIF report

[Cu(C9H6NO)2(C5H5N)]·H2O	F(000) = 1848
Mr = 448.95	Dx = 1.482 Mg m−3
Orthorhombic, Pbca	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ac 2ab	Cell parameters from 2855 reflections
a = 8.9129 (4) Å	θ = 2.6–25.1°
b = 13.9987 (7) Å	µ = 1.12 mm−1
c = 32.2568 (16) Å	T = 296 K
V = 4024.6 (3) Å3	Block, green
Z = 8	0.21 × 0.11 × 0.08 mm

Bruker APEXII CCD diffractometer	3542 independent reflections
Radiation source: fine-focus sealed tube	2301 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.050
Detector resolution: 10.00 pixels mm-1	θmax = 25.0°, θmin = 2.6°
φ and ω scans	h = −10→9
Absorption correction: multi-scan (SADABS; Bruker, 2002)	k = −14→16
Tmin = 0.800, Tmax = 0.916	l = −27→38
15390 measured reflections

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)] = 0.038	Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.093	H atoms treated by a mixture of independent and constrained refinement
S = 1.01	w = 1/[σ2(Fo2) + (0.0441P)2 + 0.2191P] where P = (Fo2 + 2Fc2)/3
3542 reflections	(Δ/σ)max = 0.001
279 parameters	Δρmax = 0.24 e Å−3
0 restraints	Δρmin = −0.27 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
Cu1	0.16872 (4)	0.91228 (3)	0.376062 (11)	0.03289 (14)
O1	0.0393 (2)	0.81502 (16)	0.39962 (6)	0.0436 (6)
O2	0.2691 (2)	1.02164 (15)	0.35011 (6)	0.0415 (6)
N1	0.1945 (3)	0.9539 (2)	0.43529 (8)	0.0393 (7)
N2	0.0918 (3)	0.88951 (18)	0.31826 (8)	0.0346 (6)
N3	0.3873 (3)	0.82435 (19)	0.37496 (8)	0.0362 (6)
C1	0.2740 (4)	1.0222 (3)	0.45151 (10)	0.0498 (9)
H1	0.3242	1.0640	0.4339	0.060*
C2	0.2872 (4)	1.0353 (3)	0.49500 (11)	0.0630 (11)
H6	0.3453	1.0847	0.5057	0.076*
C3	0.2132 (4)	0.9742 (3)	0.52092 (11)	0.0573 (10)
H2	0.2213	0.9815	0.5495	0.069*
C4	0.1255 (4)	0.9008 (3)	0.50465 (10)	0.0438 (9)
C5	0.0420 (4)	0.8341 (3)	0.52762 (11)	0.0592 (11)
H5	0.0434	0.8369	0.5564	0.071*
C6	−0.0403 (5)	0.7661 (3)	0.50858 (12)	0.0646 (12)
H4	−0.0964	0.7241	0.5246	0.078*
C7	−0.0436 (4)	0.7570 (3)	0.46570 (11)	0.0524 (10)
H3	−0.1001	0.7086	0.4537	0.063*
C8	0.0358 (4)	0.8188 (2)	0.44086 (9)	0.0383 (8)
C9	0.1197 (4)	0.8923 (2)	0.46062 (10)	0.0360 (8)
C10	0.0008 (4)	0.8235 (2)	0.30402 (10)	0.0429 (9)
H7	−0.0425	0.7807	0.3225	0.051*
C11	−0.0332 (4)	0.8157 (3)	0.26144 (11)	0.0534 (10)
H12	−0.0974	0.7680	0.2521	0.064*
C12	0.0284 (4)	0.8783 (3)	0.23423 (11)	0.0505 (10)
H11	0.0063	0.8733	0.2061	0.061*
C13	0.1255 (4)	0.9507 (2)	0.24823 (9)	0.0385 (8)
C14	0.1537 (3)	0.9534 (2)	0.29164 (9)	0.0340 (8)
C15	0.2494 (4)	1.0239 (2)	0.30931 (9)	0.0335 (8)
C16	0.3130 (4)	1.0896 (2)	0.28342 (11)	0.0495 (9)
H10	0.3749	1.1369	0.2943	0.059*
C17	0.2858 (5)	1.0865 (3)	0.24070 (11)	0.0569 (11)
H9	0.3312	1.1317	0.2237	0.068*
C18	0.1952 (4)	1.0196 (3)	0.22332 (10)	0.0542 (10)
H8	0.1794	1.0196	0.1948	0.065*
C19	0.3876 (4)	0.7353 (2)	0.36165 (10)	0.0418 (9)
H17	0.2954	0.7070	0.3560	0.050*
C20	0.5146 (4)	0.6814 (3)	0.35556 (10)	0.0475 (9)
H16	0.5084	0.6191	0.3457	0.057*
C21	0.6507 (4)	0.7222 (3)	0.36438 (10)	0.0512 (10)
H15	0.7393	0.6881	0.3607	0.061*
C22	0.6536 (4)	0.8152 (3)	0.37883 (10)	0.0515 (9)
H14	0.7441	0.8448	0.3852	0.062*
C23	0.5208 (4)	0.8629 (3)	0.38358 (10)	0.0433 (9)
H13	0.5236	0.9254	0.3933	0.052*
O3	−0.0217 (4)	0.6211 (2)	0.37607 (10)	0.0597 (8)
H19	0.006 (4)	0.671 (3)	0.3806 (12)	0.058 (15)*
H18	0.054 (5)	0.595 (3)	0.3664 (13)	0.083 (17)*

	U11	U22	U33	U12	U13	U23
Cu1	0.0354 (2)	0.0357 (2)	0.0275 (2)	−0.00361 (19)	0.00111 (18)	−0.00006 (17)
O1	0.0458 (14)	0.0499 (14)	0.0351 (12)	−0.0102 (12)	0.0018 (11)	0.0002 (11)
O2	0.0508 (14)	0.0390 (13)	0.0348 (12)	−0.0096 (12)	0.0002 (11)	0.0031 (10)
N1	0.0405 (17)	0.0416 (17)	0.0357 (14)	−0.0023 (15)	0.0023 (13)	−0.0040 (13)
N2	0.0335 (16)	0.0333 (16)	0.0369 (15)	0.0002 (14)	−0.0009 (13)	−0.0004 (12)
N3	0.0314 (16)	0.0397 (16)	0.0374 (14)	0.0014 (13)	0.0003 (13)	−0.0009 (13)
C1	0.055 (2)	0.051 (2)	0.044 (2)	−0.006 (2)	0.0066 (19)	−0.0045 (18)
C2	0.063 (3)	0.069 (3)	0.058 (2)	−0.008 (2)	−0.010 (2)	−0.022 (2)
C3	0.064 (3)	0.069 (3)	0.039 (2)	0.006 (2)	−0.005 (2)	−0.009 (2)
C4	0.045 (2)	0.055 (2)	0.0315 (17)	0.0112 (19)	0.0017 (16)	−0.0007 (17)
C5	0.068 (3)	0.077 (3)	0.0323 (19)	0.012 (2)	0.006 (2)	0.012 (2)
C6	0.075 (3)	0.069 (3)	0.049 (2)	−0.007 (2)	0.016 (2)	0.015 (2)
C7	0.053 (3)	0.054 (3)	0.050 (2)	−0.0042 (19)	0.009 (2)	0.0111 (18)
C8	0.035 (2)	0.046 (2)	0.0330 (17)	0.0102 (18)	0.0003 (15)	0.0004 (16)
C9	0.0291 (19)	0.043 (2)	0.0363 (17)	0.0119 (16)	0.0047 (15)	0.0055 (15)
C10	0.039 (2)	0.041 (2)	0.049 (2)	−0.0005 (19)	−0.0002 (17)	0.0042 (17)
C11	0.050 (2)	0.050 (2)	0.060 (2)	−0.001 (2)	−0.018 (2)	−0.012 (2)
C12	0.056 (3)	0.061 (3)	0.0341 (18)	0.009 (2)	−0.0086 (19)	−0.0006 (18)
C13	0.041 (2)	0.0435 (19)	0.0304 (16)	0.0115 (18)	−0.0014 (16)	0.0001 (16)
C14	0.034 (2)	0.0360 (18)	0.0324 (16)	0.0095 (17)	0.0033 (15)	−0.0001 (15)
C15	0.037 (2)	0.0334 (18)	0.0302 (16)	0.0038 (16)	0.0040 (16)	−0.0008 (15)
C16	0.057 (2)	0.039 (2)	0.053 (2)	−0.0053 (19)	0.0119 (19)	0.0004 (17)
C17	0.071 (3)	0.054 (2)	0.046 (2)	0.003 (2)	0.015 (2)	0.0144 (19)
C18	0.063 (3)	0.063 (3)	0.0360 (19)	0.012 (2)	0.0049 (19)	0.0081 (19)
C19	0.033 (2)	0.050 (2)	0.0422 (19)	−0.0021 (19)	−0.0001 (15)	−0.0027 (17)
C20	0.045 (2)	0.044 (2)	0.053 (2)	0.005 (2)	0.0072 (19)	−0.0028 (17)
C21	0.039 (2)	0.063 (3)	0.051 (2)	0.012 (2)	0.0079 (18)	0.0066 (19)
C22	0.034 (2)	0.073 (3)	0.048 (2)	−0.003 (2)	−0.0066 (18)	0.005 (2)
C23	0.042 (2)	0.043 (2)	0.045 (2)	−0.0025 (19)	−0.0031 (17)	−0.0039 (16)
O3	0.0487 (19)	0.0478 (19)	0.083 (2)	0.0065 (16)	0.0051 (17)	−0.0096 (17)

Cu1—O1	1.940 (2)	C8—C9	1.422 (4)
Cu1—O2	1.961 (2)	C10—C11	1.411 (4)
Cu1—N2	2.012 (3)	C10—H7	0.9300
Cu1—N1	2.011 (3)	C11—C12	1.356 (5)
Cu1—N3	2.305 (3)	C11—H12	0.9300
O1—C8	1.332 (3)	C12—C13	1.408 (5)
O2—C15	1.328 (3)	C12—H11	0.9300
N1—C1	1.299 (4)	C13—C18	1.401 (5)
N1—C9	1.363 (4)	C13—C14	1.423 (4)
N2—C10	1.312 (4)	C14—C15	1.424 (4)
N2—C14	1.357 (4)	C15—C16	1.366 (4)
N3—C19	1.318 (4)	C16—C17	1.400 (5)
N3—C23	1.336 (4)	C16—H10	0.9300
C1—C2	1.420 (4)	C17—C18	1.357 (5)
C1—H1	0.9300	C17—H9	0.9300
C2—C3	1.366 (5)	C18—H8	0.9300
C2—H6	0.9300	C19—C20	1.375 (4)
C3—C4	1.393 (5)	C19—H17	0.9300
C3—H2	0.9300	C20—C21	1.371 (4)
C4—C5	1.405 (5)	C20—H16	0.9300
C4—C9	1.426 (4)	C21—C22	1.383 (5)
C5—C6	1.349 (5)	C21—H15	0.9300
C5—H5	0.9300	C22—C23	1.367 (4)
C6—C7	1.389 (5)	C22—H14	0.9300
C6—H4	0.9300	C23—H13	0.9300
C7—C8	1.375 (4)	O3—H19	0.76 (4)
C7—H3	0.9300	O3—H18	0.83 (5)
O1—Cu1—O2	170.64 (9)	N1—C9—C4	121.8 (3)
O1—Cu1—N2	92.81 (10)	C8—C9—C4	121.7 (3)
O2—Cu1—N2	83.32 (9)	N2—C10—C11	121.8 (3)
O1—Cu1—N1	84.23 (10)	N2—C10—H7	119.1
O2—Cu1—N1	97.30 (10)	C11—C10—H7	119.1
N2—Cu1—N1	164.89 (11)	C12—C11—C10	119.6 (3)
O1—Cu1—N3	97.70 (9)	C12—C11—H12	120.2
O2—Cu1—N3	91.41 (9)	C10—C11—H12	120.2
N2—Cu1—N3	100.91 (10)	C11—C12—C13	120.4 (3)
N1—Cu1—N3	94.18 (10)	C11—C12—H11	119.8
C8—O1—Cu1	112.2 (2)	C13—C12—H11	119.8
C15—O2—Cu1	112.42 (19)	C18—C13—C12	125.8 (3)
C1—N1—C9	119.4 (3)	C18—C13—C14	117.9 (3)
C1—N1—Cu1	131.2 (2)	C12—C13—C14	116.3 (3)
C9—N1—Cu1	109.3 (2)	N2—C14—C15	116.6 (3)
C10—N2—C14	119.6 (3)	N2—C14—C13	122.2 (3)
C10—N2—Cu1	130.3 (2)	C15—C14—C13	121.2 (3)
C14—N2—Cu1	110.1 (2)	O2—C15—C16	124.6 (3)
C19—N3—C23	116.6 (3)	O2—C15—C14	117.3 (3)
C19—N3—Cu1	120.8 (2)	C16—C15—C14	118.1 (3)
C23—N3—Cu1	122.3 (2)	C15—C16—C17	120.6 (3)
N1—C1—C2	122.6 (4)	C15—C16—H10	119.7
N1—C1—H1	118.7	C17—C16—H10	119.7
C2—C1—H1	118.7	C18—C17—C16	122.1 (3)
C3—C2—C1	118.9 (4)	C18—C17—H9	119.0
C3—C2—H6	120.6	C16—C17—H9	119.0
C1—C2—H6	120.6	C17—C18—C13	120.1 (3)
C2—C3—C4	120.1 (3)	C17—C18—H8	119.9
C2—C3—H2	119.9	C13—C18—H8	119.9
C4—C3—H2	119.9	N3—C19—C20	124.5 (3)
C3—C4—C5	126.0 (3)	N3—C19—H17	117.7
C3—C4—C9	117.2 (3)	C20—C19—H17	117.7
C5—C4—C9	116.8 (3)	C21—C20—C19	118.1 (3)
C6—C5—C4	121.1 (3)	C21—C20—H16	121.0
C6—C5—H5	119.5	C19—C20—H16	121.0
C4—C5—H5	119.5	C20—C21—C22	118.6 (3)
C5—C6—C7	122.0 (4)	C20—C21—H15	120.7
C5—C6—H4	119.0	C22—C21—H15	120.7
C7—C6—H4	119.0	C23—C22—C21	118.8 (3)
C8—C7—C6	120.8 (4)	C23—C22—H14	120.6
C8—C7—H3	119.6	C21—C22—H14	120.6
C6—C7—H3	119.6	N3—C23—C22	123.4 (3)
O1—C8—C7	124.7 (3)	N3—C23—H13	118.3
O1—C8—C9	117.7 (3)	C22—C23—H13	118.3
C7—C8—C9	117.7 (3)	H19—O3—H18	102 (4)
N1—C9—C8	116.5 (3)
N2—Cu1—O1—C8	−168.2 (2)	Cu1—N1—C9—C8	−3.6 (3)
N1—Cu1—O1—C8	−3.1 (2)	C1—N1—C9—C4	0.3 (5)
N3—Cu1—O1—C8	90.4 (2)	Cu1—N1—C9—C4	176.2 (2)
N2—Cu1—O2—C15	−4.6 (2)	O1—C8—C9—N1	1.2 (4)
N1—Cu1—O2—C15	−169.4 (2)	C7—C8—C9—N1	−178.5 (3)
N3—Cu1—O2—C15	96.2 (2)	O1—C8—C9—C4	−178.6 (3)
O1—Cu1—N1—C1	178.9 (3)	C7—C8—C9—C4	1.7 (5)
O2—Cu1—N1—C1	−10.4 (3)	C3—C4—C9—N1	−1.0 (5)
N2—Cu1—N1—C1	−101.8 (5)	C5—C4—C9—N1	179.0 (3)
N3—Cu1—N1—C1	81.6 (3)	C3—C4—C9—C8	178.8 (3)
O1—Cu1—N1—C9	3.6 (2)	C5—C4—C9—C8	−1.2 (5)
O2—Cu1—N1—C9	174.3 (2)	C14—N2—C10—C11	1.1 (5)
N2—Cu1—N1—C9	82.9 (5)	Cu1—N2—C10—C11	−176.0 (2)
N3—Cu1—N1—C9	−93.7 (2)	N2—C10—C11—C12	−0.5 (5)
O1—Cu1—N2—C10	−7.0 (3)	C10—C11—C12—C13	−0.1 (5)
O2—Cu1—N2—C10	−178.4 (3)	C11—C12—C13—C18	−179.6 (3)
N1—Cu1—N2—C10	−85.2 (5)	C11—C12—C13—C14	0.1 (5)
N3—Cu1—N2—C10	91.4 (3)	C10—N2—C14—C15	179.1 (3)
O1—Cu1—N2—C14	175.7 (2)	Cu1—N2—C14—C15	−3.3 (3)
O2—Cu1—N2—C14	4.3 (2)	C10—N2—C14—C13	−1.1 (4)
N1—Cu1—N2—C14	97.5 (5)	Cu1—N2—C14—C13	176.5 (2)
N3—Cu1—N2—C14	−85.9 (2)	C18—C13—C14—N2	−179.8 (3)
O1—Cu1—N3—C19	44.9 (2)	C12—C13—C14—N2	0.5 (5)
O2—Cu1—N3—C19	−133.0 (2)	C18—C13—C14—C15	0.1 (5)
N2—Cu1—N3—C19	−49.5 (3)	C12—C13—C14—C15	−179.6 (3)
N1—Cu1—N3—C19	129.6 (2)	Cu1—O2—C15—C16	−176.7 (3)
O1—Cu1—N3—C23	−142.0 (2)	Cu1—O2—C15—C14	4.2 (3)
O2—Cu1—N3—C23	40.1 (2)	N2—C14—C15—O2	−0.5 (4)
N2—Cu1—N3—C23	123.6 (2)	C13—C14—C15—O2	179.7 (3)
N1—Cu1—N3—C23	−57.3 (2)	N2—C14—C15—C16	−179.7 (3)
C9—N1—C1—C2	0.3 (5)	C13—C14—C15—C16	0.5 (5)
Cu1—N1—C1—C2	−174.5 (3)	O2—C15—C16—C17	−179.9 (3)
N1—C1—C2—C3	−0.3 (6)	C14—C15—C16—C17	−0.8 (5)
C1—C2—C3—C4	−0.5 (6)	C15—C16—C17—C18	0.6 (6)
C2—C3—C4—C5	−178.9 (4)	C16—C17—C18—C13	0.0 (6)
C2—C3—C4—C9	1.1 (5)	C12—C13—C18—C17	179.4 (3)
C3—C4—C5—C6	179.5 (4)	C14—C13—C18—C17	−0.3 (5)
C9—C4—C5—C6	−0.5 (5)	C23—N3—C19—C20	−1.1 (5)
C4—C5—C6—C7	1.7 (6)	Cu1—N3—C19—C20	172.4 (2)
C5—C6—C7—C8	−1.1 (6)	N3—C19—C20—C21	0.9 (5)
Cu1—O1—C8—C7	−178.3 (3)	C19—C20—C21—C22	−0.1 (5)
Cu1—O1—C8—C9	2.0 (3)	C20—C21—C22—C23	−0.3 (5)
C6—C7—C8—O1	179.8 (3)	C19—N3—C23—C22	0.7 (5)
C6—C7—C8—C9	−0.5 (5)	Cu1—N3—C23—C22	−172.7 (2)
C1—N1—C9—C8	−179.5 (3)	C21—C22—C23—N3	0.0 (5)

D—H···A	D—H	H···A	D···A	D—H···A
O3—H18···O2i	0.83 (5)	1.95 (5)	2.776 (4)	173 (4)
O3—H19···O1	0.76 (4)	2.13 (4)	2.871 (4)	168 (4)

Cu1O1	1.940(2)
Cu1O2	1.961(2)
Cu1N2	2.012(3)
Cu1N1	2.011(3)
Cu1N3	2.305(3)

O1Cu1N2	92.81(10)
O2Cu1N2	83.32(9)
O1Cu1N1	84.23(10)
O2Cu1N1	97.30(10)
O1Cu1N3	97.70(9)
O2Cu1N3	91.41(9)
N2Cu1N3	100.91(10)
N1Cu1N3	94.18(10)

Table 2

Hydrogen-bond geometry (, )

DHA	DH	HA	D A	DHA
O3H18O2i	0.83(5)	1.95(5)	2.776(4)	173(4)
O3H19O1	0.76(4)	2.13(4)	2.871(4)	168(4)

Symmetry code: (i) .