title: An integrated experimental and theoretical investigation on Cu(hfa)2. TMEDA: structure, bonding and reactivity.
abstract: The physico-chemical properties of the beta-diketonate diamine Cu(ii) compound with hfa (1,1,1,5,5,5-hexafluoro-2-4-pentanedionate) and TMEDA (N,N,N',N' tetramethylethylenediamine), Cu(hfa)(2).TMEDA, have been thoroughly investigated via an integrated multi-technique experimental-computational approach. In the newly found orthorhombic polymorph, as revealed by low temperature single-crystal X-ray studies, the complex is present as a monomer with a distorted octahedral geometry at the Cu(ii) centre. The compound sublimates, without premature side decompositions, at 343 K and 10(-3) Torr. The structural, vibrational, electronic and thermal behavior of the neutral Cu(hfa)(2).TMEDA complex has been investigated along with its fragmentation pathways, initiated by the release of an anionic hfa ligand with formation of a positive Cu(hfa).TMEDA(+) ion. Joint experimental and theoretical analyses led to the rationalization of the first fragmentation steps in terms of the Cu(ii)-ligands bonding properties and Jahn-Teller distortion. The present study suggests applications of Cu(hfa)(2).TMEDA as a precursor for copper and copper oxide materials by Chemical Vapor Deposition.
authors: Department of Pharmaceutical Sciences, Padova University, 35131 Padova, Italy.
authors: Giuliano
authors: G
authors: Bandoli
authors: Davide
authors: D
authors: Barreca
authors: Alberto
authors: A
authors: Gasparotto
authors: Roberta
authors: R
authors: Seraglia
authors: Eugenio
authors: E
authors: Tondello
authors: Anjana
authors: A
authors: Devi
authors: Roland A
authors: RA
authors: Fischer
authors: Manuela
authors: M
authors: Winter
authors: Ettore
authors: E
authors: Fois
authors: Aldo
authors: A
authors: Gamba
authors: Gloria
authors: G
authors: Tabacchi
mesh_terms: D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005029:Ethylenediamines / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*
chemical_list: C544058:Cu(II)-(1,1,1,5,5,5-hexafluoro-2-4-pentanedionate)-(N,N,N',N' tetramethylethylenediamine); D005029:Ethylenediamines; D009942:Organometallic Compounds; C005798:N,N,N',N'-tetramethylethylenediamine; D003300:Copper