Tris(trimethylphosphine)cobalt(0) Compounds Containing Azaolefinic Ligands — Syntheses and Structures of Benzo[c]cinnoline and Phenylisocyanate Complexes

• Published in: Zeitschrift für Naturforschung. B, A journal of chemical sciences Vol. 48; no. 6; pp. 785 - 793
• Main Authors: Klein, Hans-Friedrich, Helwig, Michael, Karnop, Michael, König, Herbert, Hammerschmitt, Birgit, Cordier, Gerhard, Flörke, Ulrich, Haupt, Hans-Jürgen
• Format: Journal Article
• Language: English
• Published: TUBINGEN Verlag der Zeitschrift für Naturforschung 01.06.1993; Verlag Z Naturforsch
• Subjects: Chemistry; Chemistry, Inorganic & Nuclear; Chemistry, Organic; Condensed matter: structure, mechanical and thermal properties; Coordination compounds; Exact sciences and technology; Inorganic chemistry and origins of life; Inorganic compounds; Metal complexes; Physical Sciences; Physics; Preparations and properties; Science & Technology; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; PHENYLISOCYANATE; NON-CHELATING LIGANDS; COBALT COMPLEXES; STRUCTURE; AZOBENZENE; SYNTHESIS; SYSTEMS; NICKEL(O)-CATALYZED SYNTHESIS; PHENYL ISOCYANATE; DERIVATIVES; METHYLCOBALT COMPOUNDS; Cobalt Complexes; Tertiary phosphine; Molecular structure; Nitrogen heterocycle; Organic ligand; Transition metal Complexes; Zerovalent metal Complexes; Tricyclic compound; Experimental study; X ray diffraction; Complexes Mixed; EPR spectrum; Crystalline structure
• ISSN: 0932-0776; 1865-7117
• DOI: 10.1515/znb-1993-0613

Mononuclear cobalt(0) complexes Co(η -azaolefin)(PMe (azaolefin = benzo[c]cinnoline (1), p-dimethylamino-phenyl(phenyl)diazene (2), 1/2 diazobenzene (3), bis(p-tolyl)diazene (4), bis(p-fluorphenyl)diazene (5), bis(p-trifluoromethyl-phenyl)diazene (6), phenylisocyanate (7)) are obtained from Co(cyclo-C )(PMe by substitution of the olefin. X-ray crystal structure determinations of 1 and 7 show tetrahedral arrangements of ligands around the cobalt atom. By reaction with carbon monoxide carbonyl(phosphine)cobalt(0) complexes are formed. 7 catalyses the cyclotrimerization of phenylisocyanate, while with CoCl(PMe as a catalyst the cyclic dimer of phenylisocyanate is selectively formed. A convenient synthesis for CoCl(PMe is described.