Crystal structures of antimony(III) chloride complexes with pyridine

Structures and Chemical Bonding in Antimony(III) Bromide Complexes with Pyridine

“…The majority of SbÀNb onds in experimental as well as optimized geometries have NCC values less than one. However, three SbÀNb ond lengths (in 4,i n5 and in chloride analog [53 ) have NCC values of 1.01 or 1.02. All of them are related to bi-sphenoidal{ SbBr 3 Py} fragment.…”

“…Complex 5 crystallizes in the triclinic space group P1 and is isostructuralw ith its chlorinea nalog [Sb 6 Cl 18 Py 10 ]. [53] The hexameric complex consists of two neutralbisphenoidal {SbBr 3 Py} fragments,t wo cationic bisphenoidal {SbBr 2 Py 2 } + fragments, two neutralp yramidal {SbBr 3 Py 2 }f ragments and two weakly bonded bromide anions ( The {SbBr 2 Py 2 } + and {SbBr 3 Py 2 }f ragments also have pseudooctahedral geometry around the Sb atom. The pyridiner ings of the ligand in both units are in trans-position to each other and almost coplanar with the torsion angles of 0.7-6.2(6)8.T he N-Sb-N angles are 171.43 (15) and 172.98(15) in {SbBr 2 Py 2 } + and {SbBr 3 Py 2 }f ragments, respectively that agree with distorted octahedralg eometry.…”

“…[50][51][52] Recently,t he structureso ft wo molecular SbCl 3 complexes with Py have been determined by our group. [53] In both structures Cl•••Sb pnictogen bonds, where Sb acts as Lewis acid, are evident on the basis of the quantumc hemical computations. Interestingly,g roup 15 element triphenyl derivatives EPh 3 (E = P, As, Sb) form halogen bonds with iodine atoms of 1,3,5-trifluoro-2,4,6-triiodobenzene.…”

“…[54] In this case, lone pair of group 15 element actsa sn egative chargec oncentration region. Since addition of electron-withdrawings ubstituents (fluorination, chlorination) enhances the ability of antimony atomst of orm pnictogen bonds, [4,12,53] while phenyl substituents favor halogen bonds, [54] it is of interest to consider the natureo ft he interactions involved in case of antimony tribromide, SbBr 3 .…”

Antimony(V) Bromide and Polybromide Complexes with N‐alkylated Quinolinium or Isoquinolinium Cations: Substituent‐dependent Assembly of Polymeric Frameworks

“…Halide complexes of antimony represent a class of coordination compounds which, although being known for a long time, continues attracting attention. The members of this class feature ferroelectricity and ferroelasticity, biological activity, etc . Of special interest are the studies focused on the use of haloantimonates in photovoltaic devices .…”