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In each of the title compounds, R[Ph(Cl)C=(H)C]TeCl 2 , R =  n Bu ( 1 ) and Ph ( 2 ), the primary geometry about the Te IV  atom is a pseudo-trigonal-bipyramidal arrangement, with two Cl atoms in apical positions, and the lone pair of electrons and C atoms in the equatorial plane. As the Te IV  is involved in two, an intra- and an inter-molecular, Te···Cl interactions the coordination geometry might be considered as a  ψ -pentagonal bipyramid in each case. In addition, in ( 2 ) there is a hint of a Te··· π  interaction (Te···C = 3.911(3) Å). The key feature in the crystal structure of both compounds is the formation of supramolecular chains mediated by Te···Cl contacts.( 1 ): C 12 H 15 Cl 3 Te, triclinic,  P -1,  a  =  5.9471(11),  b  =  10.7826(22),  c  =  11.7983(19) Å,  α  = 75.416(12),  β  = 78.868(13),  γ  = 80.902(14)°,  V  = 713.6(2) Å 3 ,  Z  =  2,  R  1  = 0.021; ( 2 ): C 14 H 11 Cl 3 Te, orthorhombic,  Pcab ,  a  =  7.7189(10),  b  = 17.415(2),  c  = 21.568(3) Å,  V  = 2899.3(6) Å 3 ,  Z  =  8,  R  1  = 0.027.

Crystal and molecular structures of dichloro((Z)-2-chloro-2-phenylvinyl)(organo)tellurium(IV) for organo = n-butyl and phenyl