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Transition‐Metal Complexes with Bidentate Ligands Spanning trans ‐Positions. III . Preparation and solution studies of complexes [MX(1)] (M = Cu, Ag and Au; X = anionic ligand; 1 = 2, 11‐bis(diphenylphosphinomethyl)benzo[ c ]phenanthrene)
Author(s) -
Johnson D. K.,
Pregosin P. S.,
Venanzi L. M.
Publication year - 1976
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19760590808
Subject(s) - chemistry , acetonitrile , nitromethane , ionic bonding , denticity , ligand (biochemistry) , covalent bond , crystallography , metal , monomer , transition metal , inorganic chemistry , ion , organic chemistry , crystal structure , biochemistry , receptor , catalysis , polymer
The preparation of monomeric complexes [MX( 1 )] is reported where M = Cu, Ag, Au; X = I, Cl, NO 3 , BF 4 and 1 = 2,11‐bis(diphenylphosphinomethyl)benzo[ c ]phenanthrene. The solution structure of the complexes is discussed on the basis of molecular weight, conductivity and NMR. measurements. In acetonitrile and nitromethane, the nitrate and fluoroborate complexes exist as ionic species [M( 1 )] + X − whereas the halo‐complexes are present as equilibrium mixtures of ‘covalent’ and ‘ionic’ forms. All the complexes are associated in CH 2 Cl 2 ‐solutions. The values of 1 J 107 Ag ‐31 Pshow that this association in [Ag(NO 3 ) ( 1 )] and [Ag(BF 4 ) ( 1 )] is best described in terms of ion‐pairing while that for species [AgX( 1 )] (X = Cl, Br and I) is mainly ‘covalent’ in nature. Evidence is presented for the formation of the complex ion [Ag(CH 3 CN) n ( 1 )] + in acetonitrile solution.