The crystal structure of the hemiadduct of tellurium(II) ethylxanthate with 4,4′-bipyridyl: An example of unusual five-coordinate pentagonal planar geometry

Syntheses, characterizations, and crystal structures of organotin(IV) chloride complexes with 4,4′‐bipyridine

“…Two C atoms of n-butyl or benzyl groups and two Cl atoms exist in equatorial positions, while two N atoms of 4,4 -bpy occupy the axial chain position. The angles N(1) Sn(1) N(2) 178.3 (10) • , Cl(1) Sn(1) Cl(2) 178.1 (4) • , C(15) Sn(1) C(11) 172.7(11)…”

“…Although 4,4 -bpy has been extensively used in transition metal chemistry for construction of chains, rectangular grids, and cages [8,9], its use in main-group chemistry and crystallographic investigation appears to be limited [10]. Moreover, the coordination chemistry of organotin(IV) acceptors has been extensively studied due to the interest toward factors that influence the coordination number and geometry of molecule as well as for the important biological and catalytic properties of these compounds [11].…”

The Hemi-Adduct of Bis(diethyldithiocarbamato-S,S')tellurium(II) with 4,4'-Bipyridyl

“…hemi-adduct of 4,4'-bipyridyl with bis(diethylxanthato)-tellurium(ID (Hoskins, Oliver & Winter, 1984). The geometry around the Te atom is pentagonal planar, composed of the four S atoms of the two dithiocarbamate ligands and an N atom of the bipyridyl molecule.…”

Dicationic Tellurium Analogues of the Classic N‐Heterocyclic Carbene

“…Two of the other reports involve hemilabile complexes of Te II thiolates with bridging 4,4'-bipyridine ligands containing very long Te À N contacts of~2.8 . [45,46] The other example is a dicationic homoleptic Te II complex with four 4-dimethylaminopyridine ligands in a square-planar arrangement, featuring TeÀN bonds of~2.3 . [24] Conclusion Synthetic, structural, and spectroscopic studies of tellurium NHC analogues have been conducted.…”