An unprecedented coordination mode of the tris(pyrazolyl)methane donor set in {[Ph2(O)POCH2C(pz)3 Ag]2 (THF)2}(BF4)2: kappa2-kappa1 bimetallic, N(sigma)/N(pi) chelating.
The structure of the compound {[Ph2(O)POCH2C(pz)3 Ag]2 (THF)2}(BF4)2 (pz = pyrazolyl ring) revealed a new coordination mode for the tris(pyrazolyl)methane donor set: two pyrazolyl rings bridging the same two silvers atoms using normal sigma-type orbitals on the nitrogen donor atoms while the third pyrazolyl ring coordinates side-on to one of the silver atoms with a nitrogen-based pi-type orbital. The dimeric arrangement is also supported by a weak silver-silver interaction. This bonding description is supported by Fenske-Hall molecular orbital calculations.
Reger
Daniel L
DL
Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA. Reger@mail.chem.sc.edu
Semeniuc
Radu F
RF
Captain
Burjor
B
Smith
Mark D
MD