Design and Synthesis of Dizinc and Dicopper Complexes
Format
Oral Presentation
Faculty Mentor Name
Qinliang Zhao
Faculty Mentor Department
Chemistry
Abstract/Artist Statement
Dizinc complexes were developed and synthesized by using tunable formamidinate ligands with selective steric hindrance on the substitutes. Dicopper complexes supported by the same ligand framework were synthesized from the dizinc precursors through a transmetallation route. X-ray crystallography data demonstrated that the two zinc atoms in the dizinc complexes were well separated (Zn…Zn: >2.9Å) while the Cu-Cu spatial separation in the dicopper analogues exists at ~ 2.5Å. This unusually short Cu-Cu distance is supported by the 2.45Å value measured in Cu2((ptol) NCHNH(p-tol))2 found in the literature. It must be noted that this shortened distance is not attributed to any net metal-metal bond. Each Cu1 atom contains a fully occupied d10 configuration; therefore there is no possibility of a true bond between the two Cu1 atoms in each dicopper complex, due to equal electron occupation in both bonding and antibonding orbitals. The constricted Cu-Cu interaction is indicative of a cuprophilicity interaction between the two Cu atoms.
Location
DeRosa University Center, Room 211
Start Date
30-4-2016 3:00 PM
End Date
30-4-2016 5:00 PM
Design and Synthesis of Dizinc and Dicopper Complexes
DeRosa University Center, Room 211
Dizinc complexes were developed and synthesized by using tunable formamidinate ligands with selective steric hindrance on the substitutes. Dicopper complexes supported by the same ligand framework were synthesized from the dizinc precursors through a transmetallation route. X-ray crystallography data demonstrated that the two zinc atoms in the dizinc complexes were well separated (Zn…Zn: >2.9Å) while the Cu-Cu spatial separation in the dicopper analogues exists at ~ 2.5Å. This unusually short Cu-Cu distance is supported by the 2.45Å value measured in Cu2((ptol) NCHNH(p-tol))2 found in the literature. It must be noted that this shortened distance is not attributed to any net metal-metal bond. Each Cu1 atom contains a fully occupied d10 configuration; therefore there is no possibility of a true bond between the two Cu1 atoms in each dicopper complex, due to equal electron occupation in both bonding and antibonding orbitals. The constricted Cu-Cu interaction is indicative of a cuprophilicity interaction between the two Cu atoms.