Synthesis, Characterization, and Thermal and Antimicrobial Activities of Some Novel Organotin(IV): Purine Base Complexes

Table 3

¹H and ¹³C NMR data (𝛿 ppm) of theobromine complexes.

Compound	^1H NMR						^13C NMR; Sn–CH2
	–R moiety			Theobromine moiety
	Ar–H	–CH2–	–CH3 at N-3	–CH3 at N-2	H-8	–NH–
Theobromine (L^2)	—	—	3.3 (s, 3H)	3.5 (s, 3H)	7.1 (s, 1H)	13.0–13.2 (br, 1H)
(C6H5CH2)3Sn(L^2)Cl	7.0–7.4 (m, 15H)	3.8-3.9 (s, 6H)	3.4-3.5 (s, 3H)	3.6-3.7 (s, 3H)	7.7 (s, 1H)	13.2–13.4 (br, 1H)	19.56
(p-ClC6H4CH2)3Sn(L^2)Cl	7.1–7.3 (m, 12H)	3.9 (s, 6H)	3.3-3.4 (s, 3H)	3.6-3.7 (s, 3H)	7.6 (s, 1H)	13.4–13.6 (br, 1H)	25.34
(C6H5CH2)2Sn(L^2)Cl2	7.0–7.3 (m, 10H)	3.9-4.0 (s, 4H)	3.4 (s, 3H)	3.7 (s, 3H)	7.5 (s, 1H)	13.3–13.5 (br, 1H)	18.34
(p-ClC6H4CH2)2Sn(L^2)Cl2	7.1–7.3 (m, 8H)	3.8 (s, 4H)	3.3-3.4 (s, 3H)	3.6 (s, 3H)	7.8 (s, 1H)	13.3–13.6 (br, 1H)	23.66