Isolation of some sterically protected unsymmetrical diphosphenes: nature of the phosphorus-phosphorus double bond

M Yoshifuji, K Shibayama, N Inamoto…

Index: Yoshifuji, Massaaki; Shibayama, Katsuhiro; Inamoto, Naoki Journal of the American Chemical Society, 1983 , vol. 105, # 8 p. 2495 - 2497

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Citation Number: 142

Abstract

reduced by lithium aluminum hydride in ether at 0" C to give 2 almost quantitatively. 2 was recrystallized from ethanol; mp 150-152 OC; 31P NMR (CDClJ-129.9 ppm (from external 85% H3P04), 13 lJpH= 210.6 Hz. The phosphine 2 is quite stable in air and odorless. 2 and the dichloride 3 were dissolved in THF, and a slight excess of DBU (1, 8-diazabicyclo [5.4. 0] undec-7-ene) was added at 0" C to give a yellow-orange solution with insoluble salts. The ...