Title

Design and Synthesis of Dizinc and Dicopper Complexes

Lead Author Major

Chemistry

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

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Apr 30th, 3:00 PM Apr 30th, 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.