SYNTHESIS AND CHARACTERISATION OF SOME NICKEL(II) β-KETOAMINES AND THEIR ADDUCTS WITH 2,2′-BIPYRIDINE AND 1,10-PHENANTHROLINE

• Published in: Synthesis and reactivity in inorganic and metal-organic chemistry Vol. 32; no. 4; pp. 783 - 799
• Main Authors: Osowole, A. A., Woods, J. A. O., Odunola, O. A.
• Format: Journal Article
• Language: English
• Published: PHILADELPHIA Taylor & Francis Group 28.05.2002; Taylor & Francis
• Subjects: Chemistry; Chemistry, Inorganic & Nuclear; Physical Sciences; Science & Technology; PALLADIUM(II) COMPLEXES; ETHYLENE; LIGANDS; QUADRIDENTATE SCHIFF-BASES; CRYSTAL-STRUCTURE; COPPER(II); METAL; POLYMERIZATION
• ISSN: 0094-5714; 1532-2440
• DOI: 10.1081/SIM-120004446

A series of nickel(II) β -ketoimine complexes, {Ni[CH 3 -C(O)CHC(CH 3 )NR] 2 , R=CH 3 , C 4 H 9 }, and ketoiminates, {Ni[CH 3 C(O)CH(CH 3 )C(-N(CH 2 ) n N-)C(CH 3 )CHC(O)CH 3 ], n=2, 6, 8, 9}, and their adducts with 2,2′-bipyridine (bipy) and 1,10-phenanthroline (phen) have been synthesized and characterized using elemental analyses, magnetic susceptibility, conductivity, infrared and electronic spectral measurements. The ketoimine ligands coordinate to the nickel atom in a bidentate fashion using the N 2 O 2 chromophore. A range of stereochemistries was observed for the nickel(II) ketoiminates from four-coordinate tetrahedral and square-planar geometry to six-coordinate octahedral geometry. Conductivity measurements indicate that the compounds are non-electrolytes. The influence of bridging chain lengthening on the adopted geometry is discussed and possible structures for the compounds are suggested.