Journal
INORGANIC CHEMISTRY
Volume 48, Issue 4, Pages 1339-1345Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic8012427
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Funding
- National Science Foundation [CHE-0413857, CHE-0716843]
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Three new crystalline compounds of Ag(I) with fullerene-containing ligands, the piperidine adduct [C-60(N(CH2CH2)(2)N)] and the fullero[60]pyrrolidine [C-60(CH2N(CH3)CH2)], have been prepared and characterized by X-ray crystallography. The polymeric structure of {[C-60(N(CH2CH2)(2)N)][Ag(O2CCF3)](2)} center dot CS2 consists of linear chains composed of two distinct molecules of the functionalized fullerene, with four Ag(I) ions attached to the four nitrogen atoms and four bridging trifluoroacetate, ions. Two of the four Ag(I) ions form eta(2)-bonds to carbon atoms in different regions of the fullerene cage, and there is one close Ag-Ag contact (3.1657(7) angstrom) as well. These chains are further cross-linked by bridging trifluoroacetate ions. The structure of {[C-60(CH2N(CH3)CH2)]Ag(NO3)}center dot 0.25CH(3)OH involves two similar polymeric chains in which Ag(I) ions bind to the nitrogen atom of one N-methyl-3,4-fullero[60]pyrrolidine ligand and to a carbon atom of another N-methyl-3,4-fullero[60]pyrrolidine in eta(1)-fashion for one chain and in distorted eta(2)-fashion in the other. Additionally, each Ag(I) ion is bonded to two oxygen atoms from two bridging nitrate ions. On the other hand, [C-60(N(CH2CH2)(2)N)](2)Ag(NO3)center dot 0.5CH(3)OH center dot CH2Cl2 is a simple coordination complex with two very large ligands attached to Ag(I). Coordination of Ag(I) to C-60 produces much smaller alterations to the fullerene geometry than does coordination of Pt-0(PPh3)(2) or Ir-I(CO)Cl(PPh3)(2) groups.
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