Oxidative addition of cyanogen bromide to C, N-chelated and Lappert's stannylenes. Issue 16 (6th April 2021)

• Record Type: Journal Article
• Authors: Švec, Petr; Samsonov, Maksim A.; Růžičková, Zdeňka; Brus, Jiří; Růžička, Aleš
• Is Part Of: Dalton transactions. Volume 50:Issue 16(2021)
• Page Start: 5519
• Page End: 5529
• Publication Date: 2021-04-06
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d1dt00704a
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : The process of Br/CN redistribution observed within the (organo)tin(iv ) species is displayed as the Pong arcade game. Abstract : Stannylenes of L2 Sn type bearing either C, N -chelating (1, L = L CN = 2-( N, N -dimethylaminomethyl)phenyl) or bulky amido (2, L = L N = N(SiMe3 )2 ) ligands react with cyanogen bromide (Br–CN) via an oxidative-addition reaction to give monomeric six-coordinate (L CN )2 Sn(Br)CN (1a ) and four-coordinate (L N )2 Sn(Br)CN (2a ) stannanes in moderate yields. In solution, both 1a and 2a undergo instantaneous bromido-cyanido ligand redistribution reactions, leading to mixtures containing 1a, (L CN )2 SnBr2 (1b ) and (L CN )2 Sn(CN)2 (1c ) or 2a, (L N )2 SnBr2 (2b ) and (L N )2 Sn(CN)2 (2c ), respectively. The prepared species were characterised by multinuclear NMR spectroscopy in solution (1a–c and 2a–c ) and in the solid state (1a–c ). The crystal structures of 1a /b /c, 2a /b /c and sole 2b were determined by XRD analyses. DFT calculations and QTAIM analysis were also carried out to corroborate the experimental results.