[​4+2] versus [​2+2] Homodimerization in P(V) Derivatives of 2,4-Disubstituted Phospholes

Table 4

Chemical shifts (ppm) and coupling constants (Hz) of 1d, 4d, and 5d.

		^1H		^13C
Entry	R	Hα		Cα		Cβ
1	1d	6.97; (39.0)	7.48; (12.5)	127.4; (0)	153.1; (1.8)	149.3; (7.6)	131.5; (10.1)
2	4d	6.53; (30.5)	7.59; (39.5)	121.3; (86.4)	142.9; (74.0)	150.8; (17.3)	132.7; (22.9)
3	5d	4.40; (21.0)	6.58; (39.5)	40.9; (65.4)	150.9; (3.3)	65.1; (5.9)	143.5; (12.3)