New Di- and Triorganotin(IV) Tyrosylalaninates as Models for Metal—Protein Interactions: Synthesis, Structural Characterization, and Potentiometric Studies of Tyrosylalanine, Glycyltyrosine, and Glycylisoleucine with Di- and Trimethyltin(IV) Moieties in Aqueous Medium

Table 1

Analytical data of di- and triorganotin(IV) tyrosylalaninates.

Compound (empirical formula)	Yield (%)	Color and physical state	m.p. (°C)	Analysis (%): found (calculated)
				C	H	N	O	Sn
Me2Sn(Tyr-Ala)[C14H20N2O4Sn]	60	Yellow solid	210 (dec)	42.10 (42.14)	4.98 (5.05)	6.96 (7.02)	15.94 (16.04)	29.69 (29.75)
n-Bu2Sn(Tyr-Ala)[C20H32N2O4Sn]	71	White solid	153–155	49.68 (49.71)	6.63 (6.68)	5.76 (5.80)	13.20 (13.24)	24.50 (24.57)
n-Oct2Sn(Tyr-Ala)[C28H48N2O4Sn]	79	White solid	156–160	56.42 (56.48)	8.08 (8.13)	4.63 (4.70)	10.70 (10.75)	19.89 (19.94)
Ph2Sn(Tyr-Ala)[C24H24N2O4Sn]	69	White solid	168–170	55.04 (55.10)	4.58 (4.62)	5.31 (5.35)	12.18 (12.23)	22.61 (22.70)
Me3Sn(HTyr-Ala)[C15H24N2O4Sn]	46	Brown solid	183–185	43.38 (43.40)	5.80 (5.83)	6.71 (6.75)	15.39 (15.42)	28.58 (28.61)
Ph3Sn(HTyr-Ala)[C30H30N2O4Sn]	55	Light yellow solid	128–130	59.89 (59.92)	4.98 (5.03)	4.61 (4.65)	10.59 (10.64)	19.68 (19.74)