Synthesis, Characterization, Semiempirical and Biological Activities of Organotin(IV) Carboxylates with 4-Piperidinecarboxylic Acid

Table 5

¹³C NMR data^a of organotin complexes 1–5.

	Carbon number	Chemical shift (ppm)
		HL	1	2	3	4	5
	1	178.2	179.5	179.1	179.6	179.8	179.7
	2	42.6	42.1	42.8	42.4	42.6	42.8
	3,	24.2	27.3	27.7	27.2	27.9	27.2
	4,	51.1	51.3	51.6	51.5	51.8	51.2
Sn–R		—	24.6 593.1, 567.3	25.7 541.1, 516.3	135.2 56.4	−2.0 395.6	138.06 583.1, 557.3
		—	—	27.7 39.0	141.2		128.99 61.4, 59.0
		—	—	26.2 117.3, 112.6	129.1 88.2		136.57 44.3
		—	—	14.2	130.2 56.6		129.94 12.5

Chemical shifts () in ppm. ^119/117Sn, ¹³C in Hz is listed in square brackets.
See Scheme 1.