Synthesis and Structure of Organoantimony(III) Compounds Containing Antimony−Selenium and −Tellurium Terminal Bonds

Abstract

General procedures: All manipulations were carried out under an argon atmosphere using standard Schlenk tube techniques. All solvents were dried by standard procedures and distilled prior to use or stored over potassium mirror. 1 H, 13 C, 77 Se and 125 Te NMR spectra

Covalently bonded compounds of heavy group 15/16 elements – Synthesis, structure and potential application in material sciences

“…[26] A slight modification of the pincer-type ligand gave also access to monomeric ). [26] The compounds are monomeric in solution, as was shown by 1 (8)).…”

“…[26] A slight modification of the pincer-type ligand gave also access to monomeric ). [26] The compounds are monomeric in solution, as was shown by 1 (8)). [116] Moreover, the Sb-E bonds in the monomeric compounds ArSbE (E = Se, Te) and Ar'SbE (E = S, Se) are significantly shorter than the calculated Sb-E single bond values (∑ cov (Sb, E) 2.43 Å (E = S), 2.56 Å (E = Se), 2.93 Å (E = Te)), [59] but are only slightly enlarged compared to the calculated value of a Sb=E double bond (∑ cov (Sb, E) 2.27 Å( E = S), 2.40 Å (E = Se), 2.61 Å (E = Te)).…”

“…[117] These structural findings point to either a high double-bonding character or a highly polarized single bond within these compounds. [26] PhSbS --2.246 a [25] A c c e p t e d M a n u s c r i p t…”

“…Very recently, Dostál et al firstly succeeded in the stabilization of monomeric antimony(III) chalcogenides of the general type ArSbE (E = S, Se) containing a terminal Sb-E bond. The introduction of specific N,C,N-pincer-type ligands containing either amine or imine donor sides was found to be essential [25,26]. The new compounds were obtained by reaction of the monovalent organoantimony(I) compound Ar 4 Ar , which occurred with oxidation of the Sb(I) centers and breakage of the Sb-Sb bond and subsequent formation of monomeric compounds ArSbE (E = Se, Te) as shown in scheme 7.…”

Synthesis, Structure and Applications of Hypervalent Organoantimony Compounds Having Intramolecular E→Sb (E = N, O, S) Coordinations

“…Recent development shows that with the avoidance of bulky ligands such as (Me 3 Si) 2 CH [14], and 2,6-Mes 2 C 6 H 3 [15], the use of aryl ligands with one or two pendant arms (e.g. 2-(Me 2 NCH 2 )C 6 H 4 [16][17][18][19], 2,6-(Me 2 NCH 2 ) 2 C 6 H 3 [20,21], and 2,6-(ROCH 2 ) 2 C 6 H 3 (R = Me, t-Bu [22]), as well as those ortho-substituted with CH 2 NMe 2 [23,24]) or analogous ligands such as RN(CH 2 C 6 H 4 ) 2 (R = Me, t-Bu, cyclohexyl, Ph [25]) and S(CH 2 C 6 H 4 ) 2 [26] is a common strategy to generate stable organoantimony compounds. In all cases, intramolecular N, O, S Sb coordinations were observed in solution and/or solid state.…”