TY - JOUR
T1 - Synthesis and structural characterization of [Te{(SePPh2)2N}2] and [4-MeOPhTe{(SPPh2)2N}]2
AU - Novosad, Josef
AU - Lindeman, Sergey V.
AU - Marek, Jaromir
AU - Woollins, J. Derek
AU - Husebye, Steinar
PY - 1998/1/1
Y1 - 1998/1/1
N2 - Reaction of K[(SePPh2)2N] with [Te(tu)4]Cl2 (tu = thiourea) in methanol gave [Te{(SePPh2)2N}2], (1), while reaction of K[(SPPh2)2N] with 4-MeOPhTeCl3 in methanol gave [4-MeOPhTe-{(SPPh2)2N}]2, (2). The crystals of 1 are triclinic and contain centrosymmetric molecules. The ligands are bidentate and form a true square planar Te(II) complex with TeSe4 coordination. For 2, the crystals are also triclinic, and the dimeric molecules are centrosymmetric. Each dithiolate ligand bridges the two Te(II) atoms; the result is a T-shaped coordination around each tellurium atom. A tendency to weak Te-Te bonding across the ring-formed dimer roughly in the direction of the missing fourth ligand in a potential square planar tellurium coordination sphere is also found [Te-Te = 3.761 (1) Å]. In 1, the Te-Se bonds have an average length of 2.797 Å. The Te-S bonds in 2 are quite asymmetric with Te(1)-S(1) = 2.551 (3) Å and Te(1)-S(2a) = 2.873 (3) Å, while Te(1)-C(1) = 2.10 (1) Å.
AB - Reaction of K[(SePPh2)2N] with [Te(tu)4]Cl2 (tu = thiourea) in methanol gave [Te{(SePPh2)2N}2], (1), while reaction of K[(SPPh2)2N] with 4-MeOPhTeCl3 in methanol gave [4-MeOPhTe-{(SPPh2)2N}]2, (2). The crystals of 1 are triclinic and contain centrosymmetric molecules. The ligands are bidentate and form a true square planar Te(II) complex with TeSe4 coordination. For 2, the crystals are also triclinic, and the dimeric molecules are centrosymmetric. Each dithiolate ligand bridges the two Te(II) atoms; the result is a T-shaped coordination around each tellurium atom. A tendency to weak Te-Te bonding across the ring-formed dimer roughly in the direction of the missing fourth ligand in a potential square planar tellurium coordination sphere is also found [Te-Te = 3.761 (1) Å]. In 1, the Te-Se bonds have an average length of 2.797 Å. The Te-S bonds in 2 are quite asymmetric with Te(1)-S(1) = 2.551 (3) Å and Te(1)-S(2a) = 2.873 (3) Å, while Te(1)-C(1) = 2.10 (1) Å.
UR - http://www.scopus.com/inward/record.url?scp=0000561021&partnerID=8YFLogxK
U2 - 10.1002/(SICI)1098-1071(1998)9:7<615::AID-HC4>3.0.CO;2-1
DO - 10.1002/(SICI)1098-1071(1998)9:7<615::AID-HC4>3.0.CO;2-1
M3 - Article
AN - SCOPUS:0000561021
SN - 1042-7163
VL - 9
SP - 615
EP - 621
JO - Heteroatom Chemistry
JF - Heteroatom Chemistry
IS - 7
ER -