Journal of the Chemical Society, Dalton Transactions p. 2591 - 2596 (1988)
Update date:2022-08-04
Topics:
Shaw, Robert A.
Watkins, David A.
A series of trans-1,3-dialkyl-2,4-diphenyl-2,4-dithiocyclodi- λ5-phosphazanes, [PhP(S)NR]2 (R = Me, Et, Pr n, Pri, Bun, Bui, Bus, But, neopentyl, CH2Ph, or cyclohexyl) has been synthesized by a solution method and their proton, carbon-13, and phosphorus-31 n.m.r. spectra obtained. The relationships between phosphorus-31 and carbon-13 n.m.r. chemical shift data are explored; interpretation of proton n.m.r. data has led to the assignment of trans structures for the cyclodi-λ5- phosphazane molecules. Inductive and resonance substituent coefficients have been evaluated using the dual-substituent parameter method from the relative shieldings of the meta- and para-carbon nuclei in the phenyl ring.
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