Synthetic, Spectral and Thermal Studies of Tin(IV) Complexes of 1, 5‐Benzodiazepines

Abstract

Tin(IV) complexes of 7-substituted 6,7-benzo-1,5-dizepines have been synthesized in absolute alcoholic medium. Elemental analysis indicates that the complexes have 1:2 stoichiometry of the type L2SnCl4, TGA data support this conclusion. Molar conductance values in DMF at 10–3 M suggest that, these complexes are non-electrolytes. Infrared spectral data shows the involvement of C=N and NH groups in coordination with the metal ion. X-ray diffraction pattern of few representative complexes indicate that, these are having simple cubic crystal structure. The energy of activation and order of reaction are calculated using TGA data of the complexes. All these information support that Sn(IV) in these complexes exhibits coordination number eight.

Biological and Spectral Studies of Newly Synthesized Triazole Schiff Bases and Their Si(IV), Sn(IV) Complexes

“…A sharp and strong band in the region of 1582–1597 cm −1 for ν (N=CH) [ 26 ] in case of ligands, was shifted to a higher wavelength number and appears in the region of 1628–1674 cm −1 in the spectra of metal complexes, indicating the coordination of ligands through azomethine nitrogen to the metal atom. The metal nitrogen bond was further supported by the presence of a band at about ~535 cm −1 for ν (Sn–N) [ 27 ] and ~575 cm −1 for ν (Si–N) [ 28 ]. A strong band in the region of 425–378 cm −1 was assigned to ν (M–Cl) [ 29 ].…”

Synthesis of Carvedilol–Organotin Complexes and Their Effects on Reducing Photodegradation of Poly(Vinyl Chloride)

“…The 119 Sn chemical shifts are different for complexes with geometries involving four (+200 to −60 ppm), five (−90 to −190 ppm), and six coordination numbers (−210 to −400 ppm) [37][38][39]. The molar conductivity (10 −3 M; ethanol) for 1 (2.7 µS/cm), 2 (5.4 µS/cm), 3 (3.5 µS/cm), and 4 (4.8 µS/cm) confirmed that these complexes are non-electrolytic (less than 100 µS/cm) [40][41][42].…”