The 81P 1H NMR spectra of 77 four-coordinate phosphorus compounds containing elsor trans-A-ferf-butylcyclohexyl, 1menthyl, exo-or emfo-norbornyl, bornyl, 1or 2adamantyl, morphollnyl, pyrrolidlnyl, or plperazlnyl ring systems have been determined. The NMR data are arranged according to the nature of the atoms adjacent to phosphorus and are discussed briefly. The spectra of