Synthesis and Conformational Assignment of N-(E)-Stilbenyloxymethylenecarbonyl-Substituted Hydrazones of Acetone and o-(m- and p-) Chloro- (nitro-) benzaldehydes by Means of ¹H and ¹³C NMR Spectroscopy

Table 12

¹³C NMR data of compounds 19 and 20.

(a)

Compound	Carbon
	C-1	C-2,6	C-3,5	C-4	C-α	C-α′
19	144.30	128.40	126.73	145.62	132.84	123.88
	144.24	128.34	124.14	145.58	132.72	123.18
20	137.19	126.06	128.54	127.08	126.32	127.87
						127.78

(b)

Compound	Carbon
	C-1′	C-2′,6′	C-3′,5′	C-4′	C-A	C-B	C-C	C-D	C-E
19	129.06	129.56	114.79	158.60	64.83	168.57	151.23	25.21	17.62
	128.87	129.28	114.65	158.21	65.94	163.24		24.99	17.08
20	129.68	127.55	114.55	157.42	64.87	168.72	151.30	25.24	17.09
	130.11	127.62	114.72	157.79	66.03	163.43		25.02	17.63