title: Blue-, green- and non-luminescent crystals from one reaction. Isolation and structural characterization of a series of gold(I)-silver(I) heterometallic complexes utilizing a gold carbene metalloligand containing free amino groups.
abstract: The metalloligand [Au{C(NHMe)(NHCH(2)CH(2)NH(2))}(2)]Cl, 1, has been prepared by the reaction of ethylenediamine with [Au(CNMe)(2)]Cl. Compound 1 crystallized as a luminescent dimer with a Au...Au separation of 3.0224(4) A. It reacted in solution with silver hexafluorophosphate to form the coordination polymer, {[Au{mu-C(NHMe)(NHCH(2)CH(2)NH(2))}(2)Ag(NCMe)](PF(6))(2)}(n), 2. The structure of 2 involves a chain of alternating gold(I) and silver(I) ions with a Au...Ag distance of 2.9694(4)A. The reaction of the metalloligand, 1, with silver tetrafluoroborate yielded three products: the green luminescent coordination polymer, {[Au{mu-C(NHMe)(NHCH(2)CH(2)NH(2))}(2)Ag-(NCMe)](BF(4))(2)}(n), 3, which is analogous to 2; the non-luminescent binuclear complex, [Au{mu-C(NHMe)(NHCH(2)CH(2)NH(2))}(2)Ag](BF(4))(2), 4; and the blue luminescent complex, [{mu-C(NHMe)NHCH(2)CH(2)NH(MeHN)C}Au(2){mu-C(NHMe)(NHCH(2)CH(2)NH(2))}(2)Ag](BF(4))(3-) x 3(MeCN), 5. Compound 5 involves a bent Au...Ag...Au cation with two different Au...Ag distances (2.9165(8) A and 3.1743(8) A). This cation self-associates through a Au...Au interaction of 3.0275(5) A, which allows the formation of an extended zigzag chain of cations in 5.
authors.affiliation: Department of Chemistry, University of California Davis, One Shields Avenue, Davis, California 95616, USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Rios
authors.forename: Marilyn M
authors.initials: MM
authors.lastname: Olmstead
authors.forename: Alan L
authors.initials: AL
authors.lastname: Balch