TETRA COORDINATE AND PENTA COORDINATE Ni(II) COMPLEXES HAVING ONLY MONODENTATE LIGANDS

摘要

1,208,981. Phosphorus-containing nickel complexes. UNION CARBIDE CORP. 4 Jan., 1968, No. 606/68. Heading C2C. [Also in Division C5] Novel complexes of the general formula Ni[CN] 2 .xR n P[ORSP1/SP] 3-n where R and RSP1/SP are alkyl, cycloalkyl, alkylcycloalkyl, cycloalkylalkyl, aryl, aralkyl or alkaryl, n is 0, 1 or 2 and x is 2 or 3, are prepared by reacting Ni(CN) 2 with R n P[OR] 3-n in the presence of an alcohol RSP1/SPOH. The preferred temperature is from 20‹ to 150‹ C. and the complexes may be isolated by conventional techniques. The complexes are used as catalysts in the dimerization of bicyclo-[2,2,1]-hepta-2,5- diene. The dimers thus formed may be converted to compounds of the structure by treatment with an ethyl acetate solution of peracetic acid at 35‹ C.