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

Figure 6

Possible geometrical structures of the complex species: M or Me₃Sn(H₂O)₂⁺ (a); isomers of M(HL)/M(OH) (b)–(d); and M(HL)(OH) or M(OH)₂ (e).