THERMAL-ANALYSIS OF COORDINATION-COMPOUNDS .1. THERMODECOMPOSITION OFNICKEL(II) TRIPHENYLPHOSPHINE COMPLEXES WITH HALIDES, NITRATE, AND THIOCYANATE

The compounds [NiX2(PPh3)2] (where X is Cl-, Br-, I-, NO-, NCS-; and P Ph3 is triphenylphosphine) were prepared and characterized by infrared and atomic absorption spectroscopies and by carbon and hydrogen analy ses. Simultaneous thermogravimetric (TG) and derivative thermogravimet ric (DTG) curves of these complexes were recorded in air. The decrease in mass observed indicates conversion of the complexes to oxides. The thermal decomposition of the halogen and nitrate complexes occurred i n a number of steps; the thiocyanate complex decomposed in a single st ep.