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Co II ‐Komplexe von 4,6‐Dimethylpyrimidin‐2(1H)‐on
Author(s) -
Battistuzzi Raffaele,
Peyronel Giorgio
Publication year - 1984
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.19845090221
Subject(s) - chemistry , octahedron , denticity , cobalt , thiocyanate , ligand (biochemistry) , crystallography , infrared spectroscopy , metal , coordination complex , medicinal chemistry , stereochemistry , inorganic chemistry , crystal structure , biochemistry , receptor , organic chemistry
Some cobalt(II) complexes of 4,6‐dimethylpyrimidine‐2(1H)‐one (HL) have been prepared and studied by infrared and electronic spectra and by magneto‐chemical and conductometric measurements. The ligand is coordinated through the unprotonated ring‐nitrogen atom and in one case also through the carbonylic oxygen atom. The “blue” complexes [CoX 2 · 2HL] (X 2 = Cl 2 , ClBr, Br 2 , (NCS) 2 ) and [CoX 2 · 2HL] · 2HL (X = Cl, Br) have a distorted C 2v [CoX 2 N 2 ] coordination; the thiocyanate ion is N‐bonded to the metal. The “green” complexes CoX 2 · 2HL (X = Cl(4H 2 O), Br) have a square‐pyramidal [CoX 2 N 2 O] coordination. The “pink” CoX 2 · 4HL · nH 2 O (X = ClO 4 , n = 2; X = BF 4 , n = 8; X = F 3 Ac, n = 4) and “cream” CoX 2 · 4HL · 6 H 2 O (X = I, ClO 4 ) complexes have an octahedral coordination; only the F 3 Ac − ion is coordinated. The “cyclamen” CoAcL · 2HL · 2 H 2 O and Co 3 Ac 4 L 2 · 2HL · 2H 2 O complexes have a polynuclear constitution; the Ac − ion behaves as bidentate ligand.