Halides Held by Bifurcated Chalcogen-Hydrogen Bonds. Effect of μ(S,N-H) Cl Contacts on Dimerization of Cl(carbene)PdII Species

Inorganic Chemistry
Alexander S MikherdovVadim Yu Kukushkin

Abstract

The reaction of cis-[PdCl2(CNCy)2] (1) with thiazol-2-amines (2-10) leads to the C,N-chelated diaminocarbene-like complexes [PdCl{ C(N(H)4,5-R2-thiazol-2-yl)NHCy}(CNCy)] (11-14; 82-91%) in the case of 4,5-R2-thiazol-2-amines (R, R = H, H (2), Me, Me (3), -(CH2)4- (4)) and benzothiazol-2-amine (5) or gives the diaminocarbene species cis-[PdCl2{C(N(H)Cy)N(H)4-R-thiazol-2-yl}(CNCy)] (15-19; 73-93%) for the reaction with 4-aryl-substituted thiazol-2-amines (R = Ph (6), 4-MeC6H4(7), 4-FC6H4(8), 4-ClC6H4(9), 3,4-F2C6H3(10)). Inspection of the single-crystal X-ray diffraction data for 15-17 and 19 suggests that the structures of all these species exhibit previously unrecognized bifurcated chalcogen-hydrogen bonding μ(S,N-H)Cl and also PdII···PdIImetallophilic interactions. These noncovalent interactions collectively connect two symmetrically located molecules of 15-17 and 19, resulting in their solid-state dimerization. The existence of the μ(S,N-H)Cl system and its strength (6-9 kcal/mol) were additionally verified/estimated by a Hirshfeld surface analysis and DFT calculations combined with a topological analysis of the electron density distribution within the formalism of Bader's theory (AIM method) and NBO analysis. The observed no...Continue Reading

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Citations

Jan 14, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Anastasia V ChupinaMaxim N Sokolov

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