PHOSPHORUS COORDINATION COMPOUNDS OF TRANSITION METALS.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 30, 1967
- Accession Number
- AD0647265
Entities
People
- Samuel O. Grim
Organizations
- University of Maryland