Accession Number : AD0647265

Title :   PHOSPHORUS COORDINATION COMPOUNDS OF TRANSITION METALS.

Descriptive Note : Final rept., 1 Nov 64-31 Oct 66,

Corporate Author : MARYLAND UNIV COLLEGE PARK DEPT OF CHEMISTRY

Personal Author(s) : Grim,Samuel O.

Report Date : 30 JAN 1967

Pagination or Media Count : 43

Abstract : The phosphorus-31 nmr spectra of eleven cis and seven trans compounds of the type (R sub n Ph sub 3-n P)2PtCl2, where R = alkyl and n = 1,2, or 3, show that the platinum-195 to phosphorus-31 coupling constant is always larger for the cis compound than for the corresponding trans compound and that the phosphorus chemical shift of the cis compound is upfield from that of the corresponding trans compound. The formation of the tris-phosphine complex by addition of excess tertiary phosphine to the monomer has been demonstrated by conductivity and 31p nmr measurements and confirmed by isolation of the compounds, (MePh2P)3PtCl)Cl and (PrPh2P)3 - PtCl)BPh4. The preparation of several new chlorine bridged dimers is also reported. The phosphorus-31 chemical shifts are reported for twenty-five compounds of the type (RnPh sub 3-nP)M(CO)5, where R is alkyl, n is 0,1,2,3 and M is Cr, Mo, or W. The 183W-31P spin-spin coupling is observed for all the tungsten compounds and a linear correlation exists between these coupling constants and the carbonyl stretching frequencies in the respective compounds. (Author)

Descriptors :   (*NUCLEAR MAGNETIC RESONANCE, *PHOSPHORUS COMPOUNDS), PLATINUM COMPOUNDS, MOLECULAR ISOMERISM, CHROMIUM COMPOUNDS, COMPLEX COMPOUNDS, MOLYBDENUM COMPOUNDS, MATHEMATICAL PREDICTION

Subject Categories : Inorganic Chemistry
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE