Synthesis, characterization, and biological studies of tri‐ and diorganotin(IV) complexes with 2′,4′‐difluoro‐4‐hydroxy‐[1,1′]‐biphenyle‐3‐carbolic acid: Crystal structure of [(CH₃)₃Sn(C₁₃H₇O₃F₂)]

Abstract

Eight tri‐ and diorganotin(IV) carboxylates with general formulae R3SnL and R2SnL2 (where R = CH3, n‐C4H9, C6H5, C7H7, and L = 2′,4′‐difluoro‐4‐hydroxy‐[1,1′]‐biphenyl‐3‐carboxylic acid) were synthesized and characterized by UV–vis, IR, conductance, multinuclear (1H, 13C, and 119Sn) NMR spectroscopy, and mass spectrometry. The crystal structure of [(CH3)3Sn(C13H7O3F2)] indicates that the tin atom in the asymmetric unit exists in a trigonal bipyramidal geometry having a space group Pbca with an orthorhombic crystal system. These complexes were also screened for their antibacterial and antifungal activities. © 2002 Wiley Periodicals, Inc. Heteroatom Chem 13:638–649, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.10057

Di‐ and tri‐organotin(IV) derivatives of (Z)‐3‐(4‐nitrophenyl)‐2‐phenyl‐2‐propenoic acid: spectroscopic characterization and biocidal studies. Crystal structure analysis of tetrameric tri‐n‐butyltin(IV) (Z)‐3‐(4‐nitrophenyl)‐2‐phenyl‐2‐propenoate

“…NMR spectra for the new compounds and free acid have been recorded in CDCl 3 solution and are reported in Tables 3 (for 1 H) and 4 (for 13 C) and are consistent with expectation.…”

“…The 13 C NMR spectral data for the R groups attached to the tin atom, where R = CH 3 , C 2 H 5 , n-Bu, n-Oct and Ph, were assigned by comparison with related analogues as model compounds. 12 -16 The assignment of the 13 C resonances associated with the carboxylate ligand is based on comparison with the results obtained from incremental methods. 22 The positions of the phenyl and olefinic carbon signals undergo minor variations in the complexes compared with those observed in the free acid.…”

Organotin(IV) carboxylates of cyclopropane carboxylic acid and 3‐cyclohexylpropanoic acid: synthesis, characterization and biological activity. The crystal structure of bis(cyclopropanecarboxylato) tetramethyldistannoxane

“…Furthermore, two signals observed in the 119 Sn NMR spectra of 5, 6 and 11 (Table 3) also reflect different environment around the tin atoms in the same molecule, and support the presence of dimeric structure in solution. [39,40] The 1 H and 13 C NMR spectral data of 12 exhibited only one set of Sn-Bu resonances, indicating that it is a dicarboxylate, [36] not a bis(dicarboxylatotetraorganodistannoxane). Diorganotin dicarboxylates having a five-coordinate tin center show tin chemical shifts in the range of −110 to −161 ppm.…”

“…The different R groups (Me, Ph, n-Bu, c-Hex) attached to the tin atom gave signals in the expected region. [29,35,36] In complexes 1, 3, 7 and 9 the ligand protons overlap with the signal of the organic groups (n-Bu and c-Hex) attached to the tin atom, which makes the identification of the individual protons of the ligand moieties difficult. As expected, the four hydrogens on the cyclopropane ring were observed as two singlets.…”

Synthesis, spectroscopic characterization and biocidal activity of some diorganotin(IV) complexes of salicylaldehydethiosemicarbazones and related ligands. Molecular and supramolecular structures of [R2Sn(OArCHNNCSNH2)], where R = Me, Ph and Ar =  C6H4, C6H3(5‐Br) and C6H3(5‐Cl), and of [Me2Sn{OC6H3(5‐Br)CHNNCSNH2}]·OH2

“…30 The 119 Sn shifts and 1 J( 119 Sn-13 C) coupling values are indicative of penta-coordination around the tin atom. 44 …”