PHOSPHORUS COORDINATION COMPOUNDS OF TRANSITION METALS.
Final rept., 1 Nov 64-31 Oct 66,
MARYLAND UNIV COLLEGE PARK DEPT OF CHEMISTRY
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The phosphorus-31 nmr spectra of eleven cis and seven trans compounds of the type R sub n Ph sub 3-n P2PtCl2, 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, MePh2P3PtClCl and PrPh2P3 - PtClBPh4. 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-nPMCO5, 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
- Inorganic Chemistry
- Nuclear Physics and Elementary Particle Physics