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Synthesis, Crystal Structure and Spectrothermal Analysis of mer –Triaquanicotinamide‐orotato Cobalt(II) Trihydrate
Author(s) -
Yeşilel Okan Zafer,
Tezcan Fatma,
Ölmez Halis,
Paşaog;ablu Hümeyra,
Büyükgüngör Orhan
Publication year - 2005
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200500269
Subject(s) - crystallography , chemistry , crystal structure , triclinic crystal system , ligand (biochemistry) , carboxylate , octahedral molecular geometry , molecule , hydrogen bond , octahedron , ring (chemistry) , deprotonation , cobalt , stereochemistry , ion , inorganic chemistry , biochemistry , receptor , organic chemistry
The mixed–ligand orotato (HOr) 2− complex of cobalt(II) with nicotinamide (NA) [Co(HOr)(H 2 O) 3 (NA)]·3H 2 O was synthesized and characterized by elemental analysis, magnetic susceptibility, conductivity, spectral methods (UV–Vis and FT–IR), simultaneous TG, DTG, DTA techniques and X–ray diffraction. The complex crystallizes in the triclinic space group P–1 with unit cell parameters a = 9.320(5), b = 9.493(5), c = 10.381(5) Å, α = 77.003(5), β = 78.852(5), γ = 80.987(5)° and Z = 2. The crystal structure has indicated that the complex has been slightly distorted octahedral geometry and is chelated by the deprotonated N(3) pyrimidine ring and by the carboxylate oxygen atom of the orotate ligand. One nicotinamide molecule is also coordinated to the metal ion by the N atom of the pyridine ring. The crystal structure consists of discrete monomeric units of the complex, which are bridged via hydrogen bonding.