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The title compound (1) C17H28NOP, Mr=293. 39 was crystallized inthe system, with space group Pbca(# 6l) a= 20. 053(2), b= l3. 955 (2), c= l2. 526(4) A, V=3505(l) A3, Z= 8, D.= 1. 09 g/cm3, F(000) = 1280. 00, λ(MoKa) =0. 71069 A, μ(MoKa) =l. 50 cm-1. Refinement with 182 parameters and 1138 inde-pendent reflections with I>3. 00 σ(I) in the range of 2°<θ<25. O° gave R= O. 05land Rw= 0. 055. The oxide phosphetanamide ’1 exhibits puckering of the four-mem-bered ring- The dihedral angle between the planes C(l ) - P - C (3 ) and C (1 ) - C (2 )-C(3) is 15. 09° which is the least of the values found in phosphetanes- The fact thatthe large l-(di-iso-propyl)amino group is unexpectedly cis to the bulky-2-phenyl groupmakes 1 more crowed.
The title compound (1) C17H28NOP, Mr = 293 39 was crystallized inthe system with space group Pbca (# 6l) a = 20. 053 (2), b = l3.95 5 (2), c = F (000) = 1280. 00, λ (MoKa) = 0. 71069 A, μ (MoKa) = l.50 cm-1. Refinement with 182 parameters and 1138 inde-pendent reflections with I> 3. 00 σ (I) in the range of 2 ° <θ <25. O ° gave R = O. 05land Rw = 0. 055. The oxide phosphetanamide ’1 exhibits puckering of the four-mem-bered ring- The dihedral angle between the planes C (1) -P -C (3) and C (1) -C (2) -C is 15. 09 ° which is the least of the values found in phosphetanes- The fact that the large 1- (di-iso-propyl) amino group is unexpectedly cis to the bulky-2-phenyl groupmakes 1 more crowed.