Abstract
Exploring differences in various Nb(V)- and Ta(V) tropolonato complexes by a solid-state structural comparison study
Highlights
An in-depth crystallographic comparison of the crystal structures of tetrakis(tropolonato-2O,O’)niobium(V) chloride ([Nb(Trop)4]Cl) and tetrakis(tropolonato-2O,O’)tantalum(V) chloride ([Ta(Trop)4]Cl) was undertaken in an attempt to relate differences in complex stability previously noted in solution with solid-state characteristics such as coordination geometry, ligand bite angles and bond lengths
Significant differences of these parameters for the complexes of the two metal centres could translate to an ideal starting point for improved separation of tantalum and niobium
A Nb(V) metal centre is coordinated to four independent tropolonato ligands arranged in a distorted D2-square antiprismatic geometry
Summary
An in-depth crystallographic comparison of the crystal structures of tetrakis(tropolonato-2O,O’)niobium(V) chloride ([Nb(Trop)4]Cl) and tetrakis(tropolonato-2O,O’)tantalum(V) chloride ([Ta(Trop)4]Cl) was undertaken in an attempt to relate differences in complex stability previously noted in solution with solid-state characteristics such as coordination geometry, ligand bite angles and bond lengths. Significant differences of these parameters for the complexes of the two metal centres could translate to an ideal starting point for improved separation of tantalum and niobium.
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