Literature DB >> 21587710

Diaqua-(isonicotinamide-κN)(4-meth-oxy-benzoato-κO,O')(4-meth-oxy-benzoato-κO)cobalt(II).

Tuncer Hökelek, Yasemin Süzen, Barış Tercan, Erdinç Tenlik, Hacali Necefoğlu.   

Abstract

In the title complex, [Co(C(8)H(7)O(3))(2)(C(6)H(6)N(2)O)(H(2)O)(2)], the Co(II) atom is coordinated by three O atoms from two 4-meth-oxy-benzoate ligands, which act in different modes, viz. monodentate and bidentate, two water mol-ecules and one N atom of the isonicotinamide ligand in a distorted octa-hedral geometry. The monodentate-coordinated carboxyl-ate group is involved in an intra-molecular O-H⋯O hydrogen bond with the coordinated water mol-ecule. In the crystal structure, inter-molecular O-H⋯O and N-H⋯O hydrogen bonds link the mol-ecules into layers parallel to the ab plane. The crystal packing is further stabilized by weak C-H⋯O hydrogen bonds and π-π inter-actions indicated by the short distance of 3.6181 (8) Å between the centroids of the benzene and pyridine rings of neighbouring mol-ecules.

Entities:  

Year:  2010        PMID: 21587710      PMCID: PMC3006852          DOI: 10.1107/S160053681002194X

Source DB:  PubMed          Journal:  Acta Crystallogr Sect E Struct Rep Online        ISSN: 1600-5368


Related literature

For general background to niacin and the nicotinic acid deriv­ative N,N-diethyl­nicotinamide, see: Krishnamachari (1974 ▶) and Bigoli et al. (1972 ▶), respectively. For related structures, see: Greenaway et al. (1984 ▶); Hökelek et al. (2009a ▶,b ▶,c ▶,d ▶); Necefoğlu et al. (2010 ▶).

Experimental

Crystal data

[Co(C8H7O3)2(C6H6N2O)(H2O)2] M = 519.36 Monoclinic, a = 8.2666 (2) Å b = 6.8055 (2) Å c = 20.5415 (4) Å β = 99.808 (2)° V = 1138.74 (5) Å3 Z = 2 Mo Kα radiation μ = 0.81 mm−1 T = 100 K 0.39 × 0.32 × 0.28 mm

Data collection

Bruker Kappa APEXII CCD area-detector diffractometer Absorption correction: multi-scan (SADABS; Bruker, 2005 ▶) T min = 0.739, T max = 0.791 11263 measured reflections 4838 independent reflections 4597 reflections with I > 2σ(I) R int = 0.020

Refinement

R[F 2 > 2σ(F 2)] = 0.022 wR(F 2) = 0.050 S = 1.01 4838 reflections 333 parameters H atoms treated by a mixture of independent and constrained refinement Δρmax = 0.29 e Å−3 Δρmin = −0.24 e Å−3 Absolute structure: Flack (1983 ▶), 1761 Friedel pairs Flack parameter: 0.015 (7) Data collection: APEX2 (Bruker, 2007 ▶); cell refinement: 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 ▶) and PLATON (Spek, 2009 ▶). Crystal structure: contains datablocks I, global. DOI: 10.1107/S160053681002194X/cv2727sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S160053681002194X/cv2727Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
[Co(C8H7O3)2(C6H6N2O)(H2O)2]F(000) = 538
Mr = 519.36Dx = 1.515 Mg m3
Monoclinic, P21Mo Kα radiation, λ = 0.71073 Å
Hall symbol: P 2ybCell parameters from 6882 reflections
a = 8.2666 (2) Åθ = 2.5–28.4°
b = 6.8055 (2) ŵ = 0.81 mm1
c = 20.5415 (4) ÅT = 100 K
β = 99.808 (2)°Block, brown
V = 1138.74 (5) Å30.39 × 0.32 × 0.28 mm
Z = 2
Bruker Kappa APEXII CCD area-detector diffractometer4838 independent reflections
Radiation source: fine-focus sealed tube4597 reflections with I > 2σ(I)
graphiteRint = 0.020
φ and ω scansθmax = 28.4°, θmin = 1.0°
Absorption correction: multi-scan (SADABS; Bruker, 2005)h = −11→9
Tmin = 0.739, Tmax = 0.791k = −8→9
11263 measured reflectionsl = −27→27
Refinement on F2Hydrogen site location: inferred from neighbouring sites
Least-squares matrix: fullH atoms treated by a mixture of independent and constrained refinement
R[F2 > 2σ(F2)] = 0.022w = 1/[σ2(Fo2) + (0.0215P)2] where P = (Fo2 + 2Fc2)/3
wR(F2) = 0.050(Δ/σ)max = 0.003
S = 1.01Δρmax = 0.29 e Å3
4838 reflectionsΔρmin = −0.24 e Å3
333 parametersAbsolute structure: Flack (1983), 1761 Friedel pairs
Primary atom site location: structure-invariant direct methodsFlack parameter: 0.015 (7)
Secondary atom site location: difference Fourier map
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.
xyzUiso*/Ueq
Co10.83963 (2)0.92738 (3)0.717117 (8)0.01106 (5)
O10.87439 (13)0.72789 (18)0.79844 (5)0.0132 (2)
O20.75818 (13)1.01182 (18)0.81134 (5)0.0145 (2)
O30.68768 (15)0.5746 (2)1.08004 (5)0.0212 (3)
O40.78237 (13)0.51498 (18)0.63163 (5)0.0156 (2)
O50.95880 (13)0.76378 (18)0.65605 (5)0.0146 (2)
O61.43741 (13)0.13627 (18)0.56391 (5)0.0160 (2)
O71.44482 (14)1.65456 (18)0.77779 (5)0.0160 (2)
O80.60930 (14)0.78883 (19)0.68139 (6)0.0147 (2)
H810.652 (3)0.692 (4)0.6668 (10)0.024 (6)*
H820.564 (3)0.750 (4)0.7153 (12)0.052 (7)*
O90.72143 (15)1.1511 (2)0.66328 (6)0.0177 (3)
H910.639 (2)1.126 (4)0.6396 (10)0.024 (6)*
H920.749 (2)1.277 (4)0.6543 (9)0.021 (5)*
N11.05301 (16)1.0966 (2)0.74674 (6)0.0127 (3)
N21.62169 (17)1.4016 (3)0.79899 (7)0.0175 (3)
H2A1.643 (2)1.290 (4)0.8055 (9)0.015 (5)*
H2B1.708 (3)1.486 (4)0.8026 (10)0.033 (6)*
C10.80942 (19)0.8473 (3)0.83434 (7)0.0130 (3)
C20.79173 (19)0.7843 (3)0.90221 (7)0.0140 (3)
C30.86387 (19)0.6109 (3)0.92813 (7)0.0172 (3)
H30.93230.54200.90460.021*
C40.8362 (2)0.5378 (3)0.98853 (7)0.0190 (4)
H40.88620.42201.00560.023*
C50.7328 (2)0.6403 (3)1.02288 (7)0.0172 (4)
C60.6650 (2)0.8189 (3)0.99909 (8)0.0200 (4)
H60.60010.89011.02350.024*
C70.69427 (19)0.8905 (3)0.93914 (7)0.0172 (4)
H70.64891.00990.92330.021*
C80.7330 (2)0.3780 (3)1.10016 (8)0.0238 (4)
H8A0.67630.33971.13520.036*
H8B0.84930.37181.11540.036*
H8C0.70380.29061.06330.036*
C90.92278 (19)0.5941 (2)0.63394 (7)0.0125 (3)
C101.05374 (18)0.4757 (2)0.60954 (7)0.0122 (4)
C111.0197 (2)0.2936 (3)0.57978 (7)0.0160 (3)
H110.91170.24930.57160.019*
C121.14209 (19)0.1759 (3)0.56200 (7)0.0160 (3)
H121.11680.05510.54160.019*
C131.30388 (19)0.2427 (3)0.57528 (7)0.0135 (3)
C141.33919 (17)0.4281 (3)0.60267 (6)0.0160 (3)
H141.44640.47490.60930.019*
C151.2158 (2)0.5421 (3)0.61986 (7)0.0148 (3)
H151.24060.66510.63860.018*
C161.4086 (2)−0.0503 (3)0.53119 (7)0.0191 (4)
H16A1.5118−0.10950.52710.029*
H16B1.3448−0.03120.48800.029*
H16C1.3501−0.13470.55660.029*
C171.20276 (19)1.0299 (3)0.74076 (7)0.0156 (3)
H171.21250.90180.72610.019*
C181.34326 (19)1.1433 (3)0.75550 (7)0.0143 (3)
H181.44521.09100.75180.017*
C191.32986 (18)1.3358 (2)0.77577 (7)0.0119 (3)
C201.17472 (17)1.4047 (3)0.78314 (6)0.0132 (3)
H201.16141.53230.79750.016*
C211.04258 (19)1.2809 (3)0.76878 (7)0.0145 (3)
H210.94021.32730.77460.017*
C221.47067 (19)1.4762 (2)0.78517 (7)0.0135 (3)
U11U22U33U12U13U23
Co10.00979 (9)0.00942 (10)0.01397 (8)−0.00058 (10)0.00201 (6)−0.00009 (9)
O10.0127 (5)0.0116 (6)0.0158 (5)0.0014 (5)0.0036 (4)−0.0003 (4)
O20.0120 (6)0.0131 (6)0.0190 (5)0.0013 (5)0.0042 (4)0.0016 (5)
O30.0236 (7)0.0243 (8)0.0170 (5)0.0001 (6)0.0068 (5)0.0039 (5)
O40.0115 (5)0.0136 (6)0.0223 (5)−0.0021 (5)0.0046 (4)−0.0018 (5)
O50.0133 (5)0.0123 (6)0.0191 (5)−0.0025 (5)0.0051 (4)−0.0027 (5)
O60.0133 (5)0.0146 (7)0.0201 (5)0.0021 (5)0.0033 (4)−0.0031 (5)
O70.0144 (6)0.0106 (6)0.0237 (5)0.0000 (5)0.0057 (4)−0.0008 (5)
O80.0124 (6)0.0125 (7)0.0192 (5)−0.0017 (5)0.0029 (4)−0.0006 (5)
O90.0139 (6)0.0125 (7)0.0246 (6)−0.0031 (5)−0.0029 (5)0.0033 (5)
N10.0124 (6)0.0120 (7)0.0137 (5)−0.0005 (6)0.0024 (5)0.0007 (5)
N20.0111 (6)0.0087 (9)0.0324 (7)−0.0007 (6)0.0029 (5)−0.0019 (7)
C10.0066 (7)0.0138 (8)0.0178 (7)−0.0038 (6)0.0000 (6)−0.0006 (6)
C20.0121 (7)0.0141 (9)0.0153 (6)−0.0031 (7)0.0010 (5)0.0003 (6)
C30.0148 (8)0.0194 (10)0.0174 (7)0.0026 (7)0.0031 (6)−0.0007 (7)
C40.0178 (8)0.0183 (10)0.0202 (7)0.0026 (7)0.0015 (6)0.0033 (7)
C50.0148 (8)0.0226 (10)0.0139 (6)−0.0037 (7)0.0019 (6)0.0004 (6)
C60.0211 (9)0.0204 (10)0.0201 (7)0.0019 (7)0.0076 (6)−0.0029 (7)
C70.0174 (7)0.0140 (11)0.0206 (7)−0.0004 (7)0.0042 (6)−0.0006 (6)
C80.0236 (9)0.0289 (13)0.0188 (7)−0.0002 (8)0.0030 (6)0.0080 (7)
C90.0140 (8)0.0123 (9)0.0112 (6)0.0002 (6)0.0017 (6)0.0016 (6)
C100.0117 (7)0.0137 (10)0.0115 (6)0.0007 (6)0.0025 (5)0.0023 (5)
C110.0116 (8)0.0175 (9)0.0189 (7)−0.0026 (7)0.0025 (6)−0.0010 (7)
C120.0167 (8)0.0138 (9)0.0174 (7)−0.0025 (7)0.0029 (6)−0.0037 (6)
C130.0150 (8)0.0143 (9)0.0116 (6)0.0008 (7)0.0031 (5)0.0004 (6)
C140.0126 (6)0.0170 (8)0.0187 (6)−0.0038 (9)0.0034 (5)−0.0018 (8)
C150.0175 (8)0.0120 (9)0.0151 (6)−0.0023 (7)0.0031 (6)−0.0033 (6)
C160.0222 (8)0.0158 (10)0.0191 (6)0.0021 (8)0.0035 (6)−0.0044 (7)
C170.0151 (8)0.0119 (9)0.0198 (7)0.0013 (7)0.0030 (6)−0.0024 (6)
C180.0101 (7)0.0135 (9)0.0200 (7)0.0021 (7)0.0047 (6)−0.0011 (6)
C190.0121 (7)0.0126 (8)0.0116 (6)−0.0016 (6)0.0031 (5)0.0008 (6)
C200.0139 (7)0.0089 (10)0.0175 (6)0.0032 (7)0.0048 (5)−0.0019 (6)
C210.0122 (8)0.0142 (9)0.0178 (7)0.0008 (7)0.0047 (6)−0.0010 (6)
C220.0136 (7)0.0136 (10)0.0145 (6)−0.0018 (6)0.0052 (5)−0.0022 (5)
Co1—O12.1338 (11)C6—C51.392 (3)
Co1—O22.2301 (11)C6—H60.9300
Co1—O52.0506 (11)C7—C61.383 (2)
Co1—O82.1394 (12)C7—H70.9300
Co1—O92.0317 (13)C8—H8A0.9600
Co1—N12.1077 (13)C8—H8B0.9600
O1—C11.276 (2)C8—H8C0.9600
O2—C11.260 (2)C10—C91.502 (2)
O3—C51.3662 (19)C10—C111.389 (2)
O3—C81.431 (2)C10—C151.395 (2)
O4—C91.2729 (19)C11—H110.9300
O5—C91.258 (2)C12—C111.387 (2)
O6—C131.3730 (19)C12—C131.395 (2)
O6—C161.437 (2)C12—H120.9300
O7—C221.237 (2)C14—C131.392 (3)
O8—H810.83 (2)C14—C151.375 (2)
O8—H820.89 (3)C14—H140.9300
O9—H910.79 (2)C15—H150.9300
O9—H920.91 (2)C16—H16A0.9600
N1—C171.344 (2)C16—H16B0.9600
N1—C211.342 (2)C16—H16C0.9600
N2—C221.333 (2)C17—C181.385 (2)
N2—H2A0.79 (2)C17—H170.9300
N2—H2B0.91 (2)C18—H180.9300
C2—C11.489 (2)C19—C181.385 (2)
C2—C31.387 (2)C19—C201.398 (2)
C2—C71.398 (2)C20—H200.9300
C3—C41.392 (2)C21—C201.371 (2)
C3—H30.9300C21—H210.9300
C4—H40.9300C22—C191.493 (2)
C5—C41.386 (2)
O1—Co1—O260.32 (4)C6—C7—H7119.8
O1—Co1—O888.94 (4)O3—C8—H8A109.5
O5—Co1—O196.83 (4)O3—C8—H8B109.5
O5—Co1—O2156.69 (4)O3—C8—H8C109.5
O5—Co1—O892.47 (5)H8A—C8—H8B109.5
O5—Co1—N190.44 (5)H8A—C8—H8C109.5
O8—Co1—O291.64 (5)H8B—C8—H8C109.5
O9—Co1—O1153.01 (5)O4—C9—C10117.72 (14)
O9—Co1—O295.22 (5)O5—C9—O4124.05 (14)
O9—Co1—O5108.09 (5)O5—C9—C10118.23 (13)
O9—Co1—O879.99 (5)C11—C10—C9121.43 (14)
O9—Co1—N192.80 (5)C11—C10—C15118.24 (15)
N1—Co1—O197.30 (5)C15—C10—C9120.23 (14)
N1—Co1—O288.29 (5)C10—C11—H11119.1
N1—Co1—O8172.76 (5)C12—C11—C10121.90 (15)
C1—O1—Co191.92 (10)C12—C11—H11119.1
C1—O2—Co187.97 (10)C11—C12—C13118.61 (16)
C5—O3—C8117.25 (14)C11—C12—H12120.7
C9—O5—Co1127.62 (10)C13—C12—H12120.7
C13—O6—C16118.14 (12)O6—C13—C14115.31 (13)
Co1—O8—H8193.8 (15)O6—C13—C12124.54 (15)
Co1—O8—H82109.5 (15)C14—C13—C12120.15 (15)
H81—O8—H82108 (2)C13—C14—H14119.9
Co1—O9—H91117.3 (17)C15—C14—C13120.10 (14)
Co1—O9—H92134.2 (12)C15—C14—H14119.9
H91—O9—H92108 (2)C10—C15—H15119.6
C17—N1—Co1121.84 (11)C14—C15—C10120.90 (16)
C21—N1—Co1120.64 (11)C14—C15—H15119.6
C21—N1—C17117.40 (14)O6—C16—H16A109.5
C22—N2—H2A125.4 (14)O6—C16—H16B109.5
C22—N2—H2B118.0 (14)O6—C16—H16C109.5
H2A—N2—H2B117 (2)H16A—C16—H16B109.5
O1—C1—C2118.41 (15)H16A—C16—H16C109.5
O2—C1—O1119.79 (14)H16B—C16—H16C109.5
O2—C1—C2121.77 (15)N1—C17—C18122.89 (16)
C3—C2—C7118.77 (14)N1—C17—H17118.6
C3—C2—C1120.01 (15)C18—C17—H17118.6
C7—C2—C1121.09 (15)C17—C18—H18120.5
C2—C3—C4121.42 (16)C19—C18—C17119.09 (15)
C2—C3—H3119.3C19—C18—H18120.5
C4—C3—H3119.3C18—C19—C20118.15 (15)
C3—C4—H4120.6C18—C19—C22122.94 (15)
C5—C4—C3118.90 (17)C20—C19—C22118.75 (15)
C5—C4—H4120.6C19—C20—H20120.6
O3—C5—C4123.71 (17)C21—C20—C19118.87 (17)
O3—C5—C6115.79 (15)C21—C20—H20120.6
C4—C5—C6120.49 (15)N1—C21—C20123.53 (15)
C7—C6—C5119.92 (16)N1—C21—H21118.2
C7—C6—H6120.0C20—C21—H21118.2
C5—C6—H6120.0O7—C22—N2122.40 (15)
C2—C7—H7119.8O7—C22—C19119.83 (14)
C6—C7—C2120.36 (16)N2—C22—C19117.72 (15)
O2—Co1—O1—C10.09 (8)C7—C2—C1—O210.6 (2)
O5—Co1—O1—C1175.24 (9)C3—C2—C1—O18.3 (2)
O8—Co1—O1—C1−92.40 (9)C7—C2—C1—O1−167.51 (14)
O9—Co1—O1—C1−27.20 (15)C1—C2—C3—C4−173.46 (15)
N1—Co1—O1—C183.91 (9)C7—C2—C3—C42.4 (2)
O1—Co1—O2—C1−0.10 (8)C1—C2—C7—C6173.09 (15)
O5—Co1—O2—C1−12.36 (15)C3—C2—C7—C6−2.8 (2)
O8—Co1—O2—C187.75 (9)C2—C3—C4—C50.7 (3)
O9—Co1—O2—C1167.84 (9)O3—C5—C4—C3175.05 (15)
N1—Co1—O2—C1−99.50 (9)C6—C5—C4—C3−3.5 (2)
O1—Co1—O5—C960.93 (12)C7—C6—C5—O3−175.47 (15)
O2—Co1—O5—C971.64 (17)C7—C6—C5—C43.2 (2)
O8—Co1—O5—C9−28.29 (12)C2—C7—C6—C50.0 (2)
O9—Co1—O5—C9−108.57 (12)C11—C10—C9—O45.9 (2)
N1—Co1—O5—C9158.34 (12)C11—C10—C9—O5−174.93 (13)
O1—Co1—N1—C1775.29 (12)C15—C10—C9—O4−170.39 (13)
O1—Co1—N1—C21−108.72 (11)C15—C10—C9—O58.8 (2)
O2—Co1—N1—C17135.07 (12)C9—C10—C11—C12−174.61 (14)
O2—Co1—N1—C21−48.93 (11)C15—C10—C11—C121.7 (2)
O5—Co1—N1—C17−21.65 (12)C9—C10—C15—C14174.66 (14)
O5—Co1—N1—C21154.35 (11)C11—C10—C15—C14−1.7 (2)
O9—Co1—N1—C17−129.79 (12)C13—C12—C11—C100.8 (2)
O9—Co1—N1—C2146.21 (12)C11—C12—C13—O6175.92 (14)
Co1—O1—C1—O2−0.17 (14)C11—C12—C13—C14−3.3 (2)
Co1—O1—C1—C2177.95 (12)C15—C14—C13—O6−175.95 (13)
Co1—O2—C1—O10.16 (14)C15—C14—C13—C123.3 (2)
Co1—O2—C1—C2−177.89 (13)C13—C14—C15—C10−0.8 (2)
C8—O3—C5—C4−8.5 (2)N1—C17—C18—C19−1.6 (2)
C8—O3—C5—C6170.10 (14)C20—C19—C18—C172.6 (2)
Co1—O5—C9—O419.3 (2)C22—C19—C18—C17−172.69 (13)
Co1—O5—C9—C10−159.84 (9)C18—C19—C20—C21−1.3 (2)
C16—O6—C13—C125.3 (2)C22—C19—C20—C21174.22 (13)
C16—O6—C13—C14−175.44 (13)N1—C21—C20—C19−1.2 (2)
Co1—N1—C17—C18175.31 (11)O7—C22—C19—C18151.80 (15)
C21—N1—C17—C18−0.8 (2)N2—C22—C19—C18−25.7 (2)
Co1—N1—C21—C20−173.91 (11)O7—C22—C19—C20−23.5 (2)
C17—N1—C21—C202.3 (2)N2—C22—C19—C20158.99 (13)
C3—C2—C1—O2−173.63 (14)
D—H···AD—HH···AD···AD—H···A
N2—H2A···O2i0.79 (3)2.11 (3)2.877 (2)164.0 (17)
N2—H2B···O1ii0.91 (3)2.16 (3)3.050 (2)167 (2)
O8—H81···O40.83 (3)1.84 (3)2.6577 (17)167 (3)
O8—H82···O7iii0.89 (2)1.86 (3)2.7427 (16)172 (2)
O9—H91···O6iv0.786 (19)2.078 (19)2.8384 (16)163 (2)
O9—H92···O4v0.91 (3)1.72 (3)2.6307 (18)174.1 (15)
C8—H8A···O7vi0.962.533.466 (2)166
C16—H16B···O4vii0.962.523.4752 (18)171
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯AD—HH⋯ADAD—H⋯A
N2—H2A⋯O2i0.79 (3)2.11 (3)2.877 (2)164.0 (17)
N2—H2B⋯O1ii0.91 (3)2.16 (3)3.050 (2)167 (2)
O8—H81⋯O40.83 (3)1.84 (3)2.6577 (17)167 (3)
O8—H82⋯O7iii0.89 (2)1.86 (3)2.7427 (16)172 (2)
O9—H91⋯O6iv0.786 (19)2.078 (19)2.8384 (16)163 (2)
O9—H92⋯O4v0.91 (3)1.72 (3)2.6307 (18)174.1 (15)
C8—H8A⋯O7vi0.962.533.466 (2)166
C16—H16B⋯O4vii0.962.523.4752 (18)171

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) ; (v) ; (vi) ; (vii) .

  8 in total

1.  A short history of SHELX.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr A       Date:  2007-12-21       Impact factor: 2.290

2.  Some aspects of copper metabolism in pellagra.

Authors:  K A Krishnamachari
Journal:  Am J Clin Nutr       Date:  1974-02       Impact factor: 7.045

3.  Diaqua-bis[4-(dimethyl-amino)benzoato-κO](isonicotinamide-κN)manganese(II).

Authors:  Tuncer Hökelek; Hakan Dal; Barış Tercan; Ozgür Aybirdi; Hacali Necefoğlu
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2009-08-08

4.  Diaqua-bis[4-(dimethyl-amino)-benzoato]-κO,O';κO-(isonicotinamide-κN)cobalt(II).

Authors:  Tuncer Hökelek; Hakan Dal; Barış Tercan; Ozgür Aybirdi; Hacali Necefoğlu
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2009-05-14

5.  Aqua-bis(isonicotinamide-κN)bis-(4-methyl-benzoato)-κO;κO,O'-cadmium(II) monohydrate.

Authors:  Hacali Necefoğlu; Efdal Cimen; Barış Tercan; Yasemin Süzen; Tuncer Hökelek
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2010-03-13

6.  Diaqua-bis[4-(dimethyl-amino)benzoato](isonicotinamide)zinc(II).

Authors:  Tuncer Hökelek; Hakan Dal; Barış Tercan; Ozgür Aybirdi; Hacali Necefoğlu
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2009-05-14

7.  Bis(isonicotinamide-κN)bis-[4-(methyl-amino)benzoato]zinc(II) monohydrate.

Authors:  Tuncer Hökelek; Hakan Dal; Barış Tercan; Ozgür Aybirdi; Hacali Necefoğlu
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2009-10-17

8.  Structure validation in chemical crystallography.

Authors:  Anthony L Spek
Journal:  Acta Crystallogr D Biol Crystallogr       Date:  2009-01-20
  8 in total
  4 in total

1.  Bis(4-meth-oxy-benzoato)-κO,O';κO-bis-(nicotinamide-κN)zinc(II).

Authors:  Tuncer Hökelek; Güner Saka; Barış Tercan; Erdinç Tenlik; Hacali Necefoğlu
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2010-08-21

2.  Bis-(4-fluoro-benzoato)-κO,O';κO-(4-fluoro-benzoic acid-κO)bis-(nico-tinamide-κN)copper(II).

Authors:  Hacali Necefoğlu; Füreya Elif Ozbek; Vijdan Oztürk; Barış Tercan; Tuncer Hökelek
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2011-06-11

3.  Di-μ-nicotinamide-κN:O;κO:N-bis-[aqua-bis-(4-bromo-benzoato)-κO;κO,O'-manganese(II)].

Authors:  Hacali Necefoğlu; Füreya Elif Ozbek; Vijdan Oztürk; Vedat Adıgüzel; Tuncer Hökelek
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2011-07-23

4.  Di-μ-nicotinamide-κ(2) N (1):O;κ(2) O:N (1)-bis-[aqua-bis-(3-chloro-benzoato-κ(2) O,O')cadmium].

Authors:  Nihat Bozkurt; Nefise Dilek; Nagihan Caylak Delibaş; Hacali Necefoğlu; Tuncer Hökelek
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2013-06-15
  4 in total

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