metal-organic compounds
Bis(isonicotinamide-κN1)bis(4-methylbenzoato-κO)copper(II) dihydrate
aDepartment of Physics, Hacettepe University, 06800 Beytepe, Ankara, Turkey, bDepartment of Chemistry, Hitit University, 19030 Ulukavak, Çorum, Turkey, cDepartment of Physics, Karabük University, 78050 Karabük, Turkey, and dDepartment of Chemistry, Kafkas University, 36100 Kars, Turkey
*Correspondence e-mail: merzifon@hacettepe.edu.tr
In the centrosymmetric title compound, [Cu(C8H7O2)2(C6H6N2O)2]·2H2O, the CuII ion is located on a crystallographic inversion center. The is completed by one 4-methylbenzoate anion, one isonicotinamide (INA) ligand and one uncoordinated water molecule; all the ligands are monodentate. The two O and the two N atoms around the CuII ion form a slightly distorted square-planar arrangement. The dihedral angle between the carboxylate group and the attached benzene ring is 13.86 (9)°, while the pyridine and benzene rings are oriented at a dihedral angle of 86.08 (5)°. The uncoordinated water molecules are linked to the INA ligands by O—H⋯O hydrogen bonds. In the intermolecular O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds link the molecules into a three-dimensional network.
Related literature
For niacin, see: Krishnamachari (1974) and for N,N-diethylnicotinamide, see: Bigoli et al. (1972). For related structures, see: Hökelek et al. (1996, 2009a,b,c); Hökelek & Necefoğlu (1998); Necefoğlu et al. (2010a,b).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2007); cell SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supporting information
https://doi.org/10.1107/S1600536810028060/su2197sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810028060/su2197Isup2.hkl
The title compound was prepared by the reaction of CuSO4.5H2O (1.25 g, 5 mmol) in H2O (50 ml) and isonicotinamide (2.44 g, 20 mmol) in H2O (15 ml) with sodium 4-methylbenzoate (1.58 g, 10 mmol) in H2O (500 ml). The precipitated green mass was set aside in solution at ambient temperature. After three weeks it had transformed into purple crystals. These were separated off by filtration and dried at room temperature.
Atoms H21, H22 (for NH2) and H41, H42 (for H2O) were located in a difference Fourier map and were freely refined: N-H = 0.82 (2) - 0.86 (2) Å; O-H = 0.77 (3) - 0.78 (3) Å. The remaining H atoms were positioned geometrically with C—H = 0.93 and 0.96 Å for aromatic and methyl H-atoms, respectively, and constrained to ride on their parent atoms, with Uiso(H) = k × Ueq(C), where k = 1.5 for methyl H-atoms and k = 1.2 for aromatic H-atoms.
As a part of our ongoing investigation on transition metal complexes of nicotinamide (NA), one form of niacin (Krishnamachari, 1974), and/or the nicotinic acid derivative N,N-diethylnicotinamide (DENA), an important respiratory stimulant (Bigoli et al., 1972), the title compound was synthesized and its
is reported herein.The title compound is a mononuclear complex, where the CuII ion is located on a crystallographic inversion center (Fig. 1). The
contains one 4-methylbenzoate (PMB) anion, one isonicotinamide (INA) ligand and one uncoordinated water molecule, and all the ligands are coordinated in a monodentate manner. The crystal structures of some NA and/or DENA complexes of CuII, CoII, NiII, MnII and ZnII ions have been reported on recently (Hökelek et al., 1996; Necefoğlu et al., 2010a,b; Hökelek & Necefoğlu, 1998; Hökelek et al., 2009a,b,c. In the copper(II) complex, trans-Bis(benzoato-O,O')bis(N,N-diethylnicotinamide-N1)copper(II) [Hökelek et al., 1996], the two benzoate ions are coordinated to the Cu atom as bidentate ligands, while in the other structures all the ligands are coordinated in a monodentate manner.The two O atoms (O2, and the symmetry-related atom, O2') and the two N atoms (N1, and the symmetry-related atom, N1') around the CuII ion form a slightly distorted square-planar arrangement (Fig. 1). The Cu1—O2 bond length is 1.9192 (13) Å, and the Cu1—N1 bond length is 2.0562 (15) Å.The near equality of the C1—O1 [1.249 (2) Å] and C1—O2 [1.287 (2) Å] bonds in the carboxylate group indicates a delocalized bonding arrangement, rather than localized single and double bonds. The CuII ion is displaced out of the least-squares plane of the carboxylate group (O1/C1/O2) by 0.3593 (1) Å. The dihedral angle between the planar carboxylate group and the benzene ring A (= C2—C7) is 13.86 (9)°, while that between rings A and B (= N1/C9—C13) is 86.08 (5)°. The uncoordinated water molecules are linked to the INA groups by O-H···O hydrogen bonds (Table 1 and Fig. 1).
In the
intermolecular O—H···O, N—H···O and C—H···O hydrogen bonds (Table 1) link the molecules to form a three-dimensional network.For niacin, see: Krishnamachari (1974) and for N,N-diethylnicotinamide, see: Bigoli et al. (1972). For related structures, see: Hökelek et al. (1996, 2009a,b,c); Hökelek & Necefoğlu (1998); Necefoğlu et al. (2010a,b).
Data collection: APEX2 (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).Fig. 1. The molecular structure of the title compound with the atom-numbering scheme. Displacement ellipsoids are drawn at the 50% probability level. Primed atoms are generated by the symmetry operator: (') -x, -y, -z. Only one of the crystal water molecules is shown [dashed line indicates the O-H···O hydrogen-bond]. |
[Cu(C8H7O2)2(C6H6N2O)2]·2H2O | F(000) = 638 |
Mr = 614.11 | Dx = 1.579 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 5200 reflections |
a = 5.7138 (2) Å | θ = 2.7–28.2° |
b = 18.9948 (4) Å | µ = 0.91 mm−1 |
c = 11.9671 (3) Å | T = 100 K |
β = 95.906 (3)° | Block, violet |
V = 1291.92 (6) Å3 | 0.29 × 0.27 × 0.25 mm |
Z = 2 |
Bruker Kappa APEXII CCD area-detector diffractometer | 3199 independent reflections |
Radiation source: fine-focus sealed tube | 2637 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.026 |
φ and ω scans | θmax = 28.4°, θmin = 2.0° |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | h = −7→7 |
Tmin = 0.763, Tmax = 0.959 | k = −20→25 |
11754 measured reflections | l = −16→14 |
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)] = 0.035 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.080 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.08 | w = 1/[σ2(Fo2) + (0.0303P)2 + 1.1079P] where P = (Fo2 + 2Fc2)/3 |
3199 reflections | (Δ/σ)max < 0.001 |
204 parameters | Δρmax = 0.63 e Å−3 |
0 restraints | Δρmin = −0.51 e Å−3 |
[Cu(C8H7O2)2(C6H6N2O)2]·2H2O | V = 1291.92 (6) Å3 |
Mr = 614.11 | Z = 2 |
Monoclinic, P21/c | Mo Kα radiation |
a = 5.7138 (2) Å | µ = 0.91 mm−1 |
b = 18.9948 (4) Å | T = 100 K |
c = 11.9671 (3) Å | 0.29 × 0.27 × 0.25 mm |
β = 95.906 (3)° |
Bruker Kappa APEXII CCD area-detector diffractometer | 3199 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 2637 reflections with I > 2σ(I) |
Tmin = 0.763, Tmax = 0.959 | Rint = 0.026 |
11754 measured reflections |
R[F2 > 2σ(F2)] = 0.035 | 0 restraints |
wR(F2) = 0.080 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.08 | Δρmax = 0.63 e Å−3 |
3199 reflections | Δρmin = −0.51 e Å−3 |
204 parameters |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds 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 > 2sigma(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 | 0.0000 | 0.0000 | 0.0000 | 0.01074 (9) | |
O1 | 0.0382 (2) | −0.09651 (7) | −0.17689 (11) | 0.0173 (3) | |
O2 | −0.1745 (2) | −0.00164 (6) | −0.14584 (11) | 0.0140 (3) | |
O3 | −0.8594 (2) | −0.25069 (7) | 0.09449 (12) | 0.0191 (3) | |
O4 | −1.1555 (3) | −0.22382 (8) | −0.10917 (14) | 0.0184 (3) | |
H41 | −1.077 (5) | −0.2318 (14) | −0.055 (2) | 0.027 (7)* | |
H42 | −1.097 (5) | −0.1903 (14) | −0.132 (2) | 0.028 (7)* | |
N1 | −0.2249 (3) | −0.07406 (8) | 0.05451 (13) | 0.0124 (3) | |
N2 | −0.6168 (3) | −0.27723 (9) | 0.24930 (14) | 0.0158 (3) | |
H21 | −0.707 (4) | −0.3082 (12) | 0.2657 (19) | 0.016 (6)* | |
H22 | −0.487 (4) | −0.2719 (10) | 0.2909 (18) | 0.007 (5)* | |
C1 | −0.1300 (3) | −0.05595 (9) | −0.20439 (15) | 0.0134 (4) | |
C2 | −0.2973 (3) | −0.06975 (9) | −0.30646 (15) | 0.0112 (3) | |
C3 | −0.2437 (3) | −0.11966 (9) | −0.38569 (16) | 0.0144 (4) | |
H3 | −0.1009 | −0.1435 | −0.3763 | 0.017* | |
C4 | −0.4027 (3) | −0.13357 (9) | −0.47810 (16) | 0.0144 (4) | |
H4 | −0.3645 | −0.1665 | −0.5308 | 0.017* | |
C5 | −0.6202 (3) | −0.09904 (9) | −0.49401 (15) | 0.0132 (4) | |
C6 | −0.6723 (3) | −0.04968 (9) | −0.41381 (16) | 0.0136 (4) | |
H6 | −0.8162 | −0.0264 | −0.4225 | 0.016* | |
C7 | −0.5137 (3) | −0.03481 (9) | −0.32179 (16) | 0.0126 (4) | |
H7 | −0.5510 | −0.0013 | −0.2697 | 0.015* | |
C8 | −0.7908 (3) | −0.11485 (10) | −0.59515 (16) | 0.0175 (4) | |
H8A | −0.8165 | −0.1647 | −0.6006 | 0.026* | |
H8B | −0.7274 | −0.0984 | −0.6616 | 0.026* | |
H8C | −0.9374 | −0.0915 | −0.5878 | 0.026* | |
C9 | −0.4391 (3) | −0.08763 (10) | 0.00027 (16) | 0.0143 (4) | |
H9 | −0.4908 | −0.0604 | −0.0621 | 0.017* | |
C10 | −0.5851 (3) | −0.14000 (9) | 0.03306 (16) | 0.0149 (4) | |
H10 | −0.7323 | −0.1471 | −0.0062 | 0.018* | |
C11 | −0.5111 (3) | −0.18220 (9) | 0.12538 (16) | 0.0132 (4) | |
C12 | −0.2892 (3) | −0.16896 (9) | 0.18202 (16) | 0.0149 (4) | |
H12 | −0.2327 | −0.1958 | 0.2440 | 0.018* | |
C13 | −0.1551 (3) | −0.11484 (10) | 0.14368 (16) | 0.0150 (4) | |
H13 | −0.0079 | −0.1062 | 0.1820 | 0.018* | |
C14 | −0.6762 (3) | −0.24014 (9) | 0.15535 (16) | 0.0145 (4) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cu1 | 0.01320 (16) | 0.01035 (15) | 0.00829 (16) | −0.00275 (12) | −0.00076 (11) | −0.00013 (12) |
O1 | 0.0140 (7) | 0.0194 (7) | 0.0172 (7) | 0.0006 (5) | −0.0041 (5) | 0.0042 (5) |
O2 | 0.0181 (6) | 0.0127 (6) | 0.0103 (6) | −0.0040 (5) | −0.0020 (5) | 0.0005 (5) |
O3 | 0.0180 (7) | 0.0167 (6) | 0.0217 (8) | −0.0030 (5) | −0.0025 (6) | 0.0026 (6) |
O4 | 0.0205 (8) | 0.0147 (7) | 0.0189 (8) | −0.0022 (6) | −0.0036 (6) | 0.0018 (6) |
N1 | 0.0131 (8) | 0.0128 (7) | 0.0110 (8) | −0.0015 (6) | −0.0007 (6) | −0.0005 (6) |
N2 | 0.0154 (9) | 0.0143 (8) | 0.0168 (9) | −0.0034 (6) | −0.0019 (7) | 0.0021 (6) |
C1 | 0.0144 (9) | 0.0138 (8) | 0.0118 (9) | −0.0058 (7) | 0.0011 (7) | 0.0037 (7) |
C2 | 0.0129 (9) | 0.0102 (8) | 0.0102 (9) | −0.0029 (6) | −0.0004 (7) | 0.0014 (6) |
C3 | 0.0139 (9) | 0.0128 (8) | 0.0164 (10) | 0.0011 (7) | 0.0013 (7) | 0.0016 (7) |
C4 | 0.0195 (9) | 0.0109 (8) | 0.0131 (9) | −0.0004 (7) | 0.0024 (7) | −0.0036 (7) |
C5 | 0.0163 (9) | 0.0117 (8) | 0.0110 (9) | −0.0045 (7) | −0.0010 (7) | 0.0016 (7) |
C6 | 0.0130 (9) | 0.0127 (8) | 0.0149 (10) | 0.0003 (6) | 0.0003 (7) | 0.0019 (7) |
C7 | 0.0155 (9) | 0.0106 (8) | 0.0117 (9) | −0.0016 (6) | 0.0014 (7) | −0.0011 (7) |
C8 | 0.0205 (10) | 0.0174 (9) | 0.0136 (10) | −0.0034 (7) | −0.0032 (8) | −0.0003 (7) |
C9 | 0.0161 (9) | 0.0142 (9) | 0.0124 (9) | 0.0014 (6) | 0.0000 (7) | −0.0001 (7) |
C10 | 0.0148 (9) | 0.0147 (9) | 0.0149 (10) | 0.0004 (7) | −0.0004 (7) | −0.0015 (7) |
C11 | 0.0152 (9) | 0.0110 (8) | 0.0137 (10) | 0.0005 (6) | 0.0028 (7) | −0.0014 (7) |
C12 | 0.0200 (10) | 0.0130 (8) | 0.0116 (9) | −0.0013 (7) | 0.0012 (7) | 0.0014 (7) |
C13 | 0.0149 (9) | 0.0164 (9) | 0.0131 (9) | −0.0001 (7) | −0.0013 (7) | 0.0001 (7) |
C14 | 0.0133 (9) | 0.0120 (8) | 0.0183 (10) | 0.0011 (7) | 0.0027 (7) | −0.0012 (7) |
Cu1—O2 | 1.9192 (13) | C4—H4 | 0.9300 |
Cu1—O2i | 1.9192 (13) | C5—C4 | 1.401 (3) |
Cu1—N1 | 2.0562 (15) | C5—C6 | 1.396 (3) |
Cu1—N1i | 2.0562 (15) | C5—C8 | 1.504 (3) |
O1—C1 | 1.249 (2) | C6—H6 | 0.9300 |
O2—C1 | 1.287 (2) | C7—C6 | 1.382 (3) |
O3—C14 | 1.228 (2) | C7—H7 | 0.9300 |
O4—H41 | 0.77 (3) | C8—H8A | 0.9600 |
O4—H42 | 0.78 (3) | C8—H8B | 0.9600 |
N1—C9 | 1.350 (2) | C8—H8C | 0.9600 |
N1—C13 | 1.345 (2) | C9—H9 | 0.9300 |
N2—C14 | 1.341 (2) | C10—C9 | 1.381 (3) |
N2—H21 | 0.82 (2) | C10—C11 | 1.395 (3) |
N2—H22 | 0.86 (2) | C10—H10 | 0.9300 |
C2—C1 | 1.495 (3) | C11—C12 | 1.398 (3) |
C2—C3 | 1.397 (2) | C11—C14 | 1.516 (2) |
C2—C7 | 1.398 (3) | C12—C13 | 1.388 (2) |
C3—C4 | 1.383 (3) | C12—H12 | 0.9300 |
C3—H3 | 0.9300 | C13—H13 | 0.9300 |
O2i—Cu1—O2 | 180.00 (4) | C7—C6—C5 | 121.11 (17) |
O2—Cu1—N1 | 89.67 (6) | C7—C6—H6 | 119.4 |
O2i—Cu1—N1 | 90.33 (6) | C2—C7—H7 | 119.8 |
O2—Cu1—N1i | 90.33 (6) | C6—C7—C2 | 120.40 (17) |
O2i—Cu1—N1i | 89.67 (6) | C6—C7—H7 | 119.8 |
N1—Cu1—N1i | 180.00 (10) | C5—C8—H8A | 109.5 |
C1—O2—Cu1 | 113.26 (12) | C5—C8—H8B | 109.5 |
H42—O4—H41 | 103 (3) | C5—C8—H8C | 109.5 |
C9—N1—Cu1 | 122.91 (12) | H8A—C8—H8B | 109.5 |
C13—N1—Cu1 | 120.10 (12) | H8A—C8—H8C | 109.5 |
C13—N1—C9 | 116.85 (16) | H8B—C8—H8C | 109.5 |
C14—N2—H21 | 117.9 (16) | N1—C9—C10 | 123.05 (17) |
C14—N2—H22 | 123.8 (14) | N1—C9—H9 | 118.5 |
H22—N2—H21 | 118 (2) | C10—C9—H9 | 118.5 |
O1—C1—O2 | 122.72 (18) | C9—C10—C11 | 119.75 (17) |
O1—C1—C2 | 121.14 (17) | C9—C10—H10 | 120.1 |
O2—C1—C2 | 116.10 (16) | C11—C10—H10 | 120.1 |
C3—C2—C1 | 120.47 (16) | C10—C11—C12 | 117.82 (17) |
C3—C2—C7 | 119.07 (17) | C10—C11—C14 | 117.32 (16) |
C7—C2—C1 | 120.42 (16) | C12—C11—C14 | 124.85 (17) |
C2—C3—H3 | 120.0 | C11—C12—H12 | 120.7 |
C4—C3—C2 | 120.03 (17) | C13—C12—C11 | 118.51 (17) |
C4—C3—H3 | 120.0 | C13—C12—H12 | 120.7 |
C3—C4—C5 | 121.34 (17) | N1—C13—C12 | 124.04 (17) |
C3—C4—H4 | 119.3 | N1—C13—H13 | 118.0 |
C5—C4—H4 | 119.3 | C12—C13—H13 | 118.0 |
C4—C5—C8 | 120.56 (16) | O3—C14—N2 | 122.56 (17) |
C6—C5—C4 | 118.05 (17) | O3—C14—C11 | 119.40 (17) |
C6—C5—C8 | 121.39 (17) | N2—C14—C11 | 118.03 (17) |
C5—C6—H6 | 119.4 | ||
O2i—Cu1—N1—C9 | 161.86 (14) | C1—C2—C7—C6 | −177.34 (16) |
O2—Cu1—N1—C9 | −18.14 (14) | C3—C2—C7—C6 | 0.2 (3) |
O2i—Cu1—N1—C13 | −22.59 (14) | C2—C3—C4—C5 | −0.7 (3) |
O2—Cu1—N1—C13 | 157.41 (14) | C6—C5—C4—C3 | 0.2 (3) |
N1—Cu1—O2—C1 | −76.89 (12) | C8—C5—C4—C3 | 179.96 (17) |
N1i—Cu1—O2—C1 | 103.11 (12) | C4—C5—C6—C7 | 0.5 (3) |
Cu1—O2—C1—O1 | −11.8 (2) | C8—C5—C6—C7 | −179.23 (16) |
Cu1—O2—C1—C2 | 166.15 (11) | C2—C7—C6—C5 | −0.7 (3) |
Cu1—N1—C9—C10 | 176.28 (14) | C11—C10—C9—N1 | −0.8 (3) |
C13—N1—C9—C10 | 0.6 (3) | C9—C10—C11—C12 | 0.5 (3) |
Cu1—N1—C13—C12 | −175.86 (14) | C9—C10—C11—C14 | −178.32 (16) |
C9—N1—C13—C12 | 0.0 (3) | C10—C11—C12—C13 | 0.0 (3) |
C3—C2—C1—O1 | −13.1 (3) | C14—C11—C12—C13 | 178.73 (17) |
C7—C2—C1—O1 | 164.51 (16) | C10—C11—C14—O3 | 4.5 (2) |
C3—C2—C1—O2 | 169.00 (16) | C10—C11—C14—N2 | −174.41 (17) |
C7—C2—C1—O2 | −13.4 (2) | C12—C11—C14—O3 | −174.24 (18) |
C7—C2—C3—C4 | 0.5 (3) | C12—C11—C14—N2 | 6.9 (3) |
C1—C2—C3—C4 | 178.05 (16) | C11—C12—C13—N1 | −0.3 (3) |
Symmetry code: (i) −x, −y, −z. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H21···O1ii | 0.82 (2) | 2.46 (2) | 3.283 (2) | 177 (2) |
N2—H22···O4iii | 0.86 (2) | 2.14 (2) | 2.983 (2) | 171 (2) |
O4—H41···O3 | 0.77 (3) | 2.10 (3) | 2.866 (2) | 178 (3) |
O4—H42···O1iv | 0.78 (3) | 2.04 (3) | 2.813 (2) | 173 (3) |
C3—H3···O3v | 0.93 | 2.48 | 3.324 (2) | 151 |
C10—H10···O1iv | 0.93 | 2.50 | 3.242 (2) | 137 |
C12—H12···O4iii | 0.93 | 2.34 | 3.253 (2) | 169 |
Symmetry codes: (ii) x−1, −y−1/2, z+1/2; (iii) x+1, −y−1/2, z+1/2; (iv) x−1, y, z; (v) x+1, −y−1/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | [Cu(C8H7O2)2(C6H6N2O)2]·2H2O |
Mr | 614.11 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 100 |
a, b, c (Å) | 5.7138 (2), 18.9948 (4), 11.9671 (3) |
β (°) | 95.906 (3) |
V (Å3) | 1291.92 (6) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.91 |
Crystal size (mm) | 0.29 × 0.27 × 0.25 |
Data collection | |
Diffractometer | Bruker Kappa APEXII CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.763, 0.959 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 11754, 3199, 2637 |
Rint | 0.026 |
(sin θ/λ)max (Å−1) | 0.669 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.035, 0.080, 1.08 |
No. of reflections | 3199 |
No. of parameters | 204 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.63, −0.51 |
Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SAINT (Bruker, 2007, SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997), WinGX (Farrugia, 1999).
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H21···O1i | 0.82 (2) | 2.46 (2) | 3.283 (2) | 177 (2) |
N2—H22···O4ii | 0.86 (2) | 2.14 (2) | 2.983 (2) | 171 (2) |
O4—H41···O3 | 0.77 (3) | 2.10 (3) | 2.866 (2) | 178 (3) |
O4—H42···O1iii | 0.78 (3) | 2.04 (3) | 2.813 (2) | 173 (3) |
C3—H3···O3iv | 0.93 | 2.48 | 3.324 (2) | 151 |
C10—H10···O1iii | 0.93 | 2.50 | 3.242 (2) | 137 |
C12—H12···O4ii | 0.93 | 2.34 | 3.253 (2) | 169 |
Symmetry codes: (i) x−1, −y−1/2, z+1/2; (ii) x+1, −y−1/2, z+1/2; (iii) x−1, y, z; (iv) x+1, −y−1/2, z−1/2. |
Acknowledgements
The authors are indebted to Anadolu University and the Medicinal Plants and Medicine Research Centre of Anadolu University, Eskişehir, Turkey, for the use of the X-ray diffractometer. This work was supported financially by Kafkas University Research Fund (grant No. 2009-FEF-03).
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
As a part of our ongoing investigation on transition metal complexes of nicotinamide (NA), one form of niacin (Krishnamachari, 1974), and/or the nicotinic acid derivative N,N-diethylnicotinamide (DENA), an important respiratory stimulant (Bigoli et al., 1972), the title compound was synthesized and its crystal structure is reported herein.
The title compound is a mononuclear complex, where the CuII ion is located on a crystallographic inversion center (Fig. 1). The asymmetric unit contains one 4-methylbenzoate (PMB) anion, one isonicotinamide (INA) ligand and one uncoordinated water molecule, and all the ligands are coordinated in a monodentate manner. The crystal structures of some NA and/or DENA complexes of CuII, CoII, NiII, MnII and ZnII ions have been reported on recently (Hökelek et al., 1996; Necefoğlu et al., 2010a,b; Hökelek & Necefoğlu, 1998; Hökelek et al., 2009a,b,c. In the copper(II) complex, trans-Bis(benzoato-O,O')bis(N,N-diethylnicotinamide-N1)copper(II) [Hökelek et al., 1996], the two benzoate ions are coordinated to the Cu atom as bidentate ligands, while in the other structures all the ligands are coordinated in a monodentate manner.
The two O atoms (O2, and the symmetry-related atom, O2') and the two N atoms (N1, and the symmetry-related atom, N1') around the CuII ion form a slightly distorted square-planar arrangement (Fig. 1). The Cu1—O2 bond length is 1.9192 (13) Å, and the Cu1—N1 bond length is 2.0562 (15) Å.The near equality of the C1—O1 [1.249 (2) Å] and C1—O2 [1.287 (2) Å] bonds in the carboxylate group indicates a delocalized bonding arrangement, rather than localized single and double bonds. The CuII ion is displaced out of the least-squares plane of the carboxylate group (O1/C1/O2) by 0.3593 (1) Å. The dihedral angle between the planar carboxylate group and the benzene ring A (= C2—C7) is 13.86 (9)°, while that between rings A and B (= N1/C9—C13) is 86.08 (5)°. The uncoordinated water molecules are linked to the INA groups by O-H···O hydrogen bonds (Table 1 and Fig. 1).
In the crystal structure intermolecular O—H···O, N—H···O and C—H···O hydrogen bonds (Table 1) link the molecules to form a three-dimensional network.