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Organotellurium(IV) Derivatives of Tetraphenyldichalcogenoimidodiphosphinates − The Crystal and Molecular Structure of [C 4 H 8 TeI{Ph 2 (Se)PNP(Se)Ph 2 }], [C 4 H 8 TeI{Ph 2 (S)PNP(S)Ph 2 }], [C 4 H 8 Te{Ph 2 (S)PNP(S)Ph 2 } 2 ], [C 8 H 8 TeI{Ph 2 (S)PNP(S)Ph 2 }], and [O(TeC 4 H 8 ) 2 {Ph 2 (O)PNP(O)Ph 2 }] 2 [I, I 3 ] Representing a Novel Type of Ring Systems
Author(s) -
GarcíaMontalvo Verónica,
ZamoraRosete M. Kenia,
Gorostieta Diego,
CeaOlivares Raymundo,
Toscano R. Alfredo,
HernándezOrtega Simón
Publication year - 2001
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200109)2001:9<2279::aid-ejic2279>3.0.co;2-y
Subject(s) - chemistry , tellurium , crystallography , octahedron , coordination sphere , chalcogen , denticity , lone pair , stereochemistry , crystal structure , ring (chemistry) , coordination complex , trigonal bipyramidal molecular geometry , chelation , square pyramidal molecular geometry , cationic polymerization , molecule , inorganic chemistry , metal , organic chemistry
The synthesis of the following organotellurium(IV) compounds [C 4 H 8 TeI{Ph 2 (Se)PNP(Se)Ph 2 }] ( 2 ), [C 4 H 8 TeI{Ph 2 (S)PNP(S)Ph 2 }] ( 3 ), [C 8 H 8 TeI{Ph 2 (S)PNP(S)Ph 2 }] ( 4 ), [C 4 H 8 Te{Ph 2 (S)PNP(S)Ph 2 } 2 ] ( 5 ), and [O(TeC 4 H 8 ) 2 {Ph 2 (O)PNP(O)Ph 2 }] 2 [I, I 3 ] ( 6 ) was achieved. These compounds have been characterized by microanalysis, multielement NMR and IR spectroscopy, positive ion FAB mass spectrometry and single‐crystal X‐ray diffraction analysis. The solid‐state structures show that the coordination geometry at the tellurium center in every derivative can be described as a distorted pseudo‐trigonal bipyramid, in which the lone‐pair of electrons is supposed to occupy an equatorial position. The selenium and sulfur ligands exhibit an aniso‐bidentate chelating coordination mode on interaction with the tellurium center. When the aniso‐bonded donor atoms are included in the coordination sphere, the environment about Te becomes distorted square‐pyramidal for the monochelate derivatives 2 − 4 and distorted octahedral for the bis(chelate) compound 5 . In compound 6 , two oxygen ligands act as bridges between two C 4 H 8 Te−O−TeC 4 H 8 units, forming a 16‐membered cationic ring. The anions, I − and I 3 − , are located above and below the twisted ring with Te ··· I interactions ranging from 3.532(2) to 3.902(3) Å.