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The novel diphenyltin(IV) compound [Ph 2 (HyFoSc)Sn] ( 2 ), where H 2 HyFoSc ( 1 ) is 3-hydroxy-2-formylpyridine semicarbazone, was prepared and characterized by vibrational and NMR ( 1 H,  13 C) spectroscopy. The structure of [Ph 2 (HyFoSc)Sn] was confirmed by single-crystal X-ray crystallography. The doubly deprotonated ligand is coordinated to the tin atom through the enolic-oxygen, the azomethine-nitrogen, and phenolic-oxygen, and so acts as an anionic tridentate ligand with the ONO donors. Two carbon atoms complete the fivefold coordination at the tin(IV) center. Intermolecular hydrogen bonding, C–H →  π , and  π  →  π  interactions combine to stabilize the crystal structure. Compounds  1  and  2  have been evaluated for antiproliferative activity in vitro against the cells of three human tumor cell lines: MCF-7 (human breast cancer cell line), T24 (bladder cancer cell line), A549 (nonsmall cell lung carcinoma), and a mouse fibroblast L-929 cancer cell line.

Organotin Compound Derived from 3-Hydroxy-2-formylpyridine Semicarbazone: Synthesis, Crystal Structure, and Antiproliferative Activity