No abstract

Skeletal P-N-P unit conformational preferences of the unsymmetrically substituted bis(phosphino)amines erythro-¡-PrN[PhP(i-PrNH)][PhP(EtNH)] (4A), meso-and ¿,/-z-PrN[PhP(¡-PrNH)]2 (5A and SB), erythro-i--[PhP(z'-PrNH)] [PhP(z-BuNH)] ( 6), eryZAro-z-PrN[PhP(z-PrNH)][PhP(PhNH)] (7), and eryfAro-i-PrN[PhP-(PhNH)]2 (8) have been examined. Compound 8, newly prepared in this study, and the previously synthesized 4A and 5A have been characterized by X-ray single-crystal analysis: 4A, monoclinic, Pl\/n, a = 10.678(4) A, b =