Notes trigonal-bipyramidal sites around each phosphorus. The structure of A is consistent with , 13C, and 1 'B NMR spectra which indicate only one environment for each respective type of nucleus. However the spectra do not absolutely rule out isomer B or a mixture of isomers since five-coordinate phosphorus compounds are often stereochemically nonrigid.as well as the Raman spectrum and to Professor H. C. Kelly for his helpful comments. We gratefully acknowledge use of NMR and EPR instruments purchased under NSF Grants GP-8542 and GP-18110 and the support of this work by the Robert A. Welch Foundation under Grant E-439.Registry No. Na2[(CH30)3P.BH3]2, 57325-21-0; NaCioHs, 3481-12-7; (CH30)3P-BH3, 6867-39-6.
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