Coordination networks constructed with supramolecular synthon RX–CC⊃Agn (n=4, 5; RX=halophenyl)
摘要:
Eight new silver(l) double salts: AgL1 center dot 2AgCF(3)COO (1), AgL1 center dot 3AgNO(3) (2), 2AgL(2)center dot 5AgCF(3)COO center dot 2CH(3)CN center dot H2O (3), 4AgL(3)center dot 6AgCF(3)COO center dot 5CH(3)CN (4), 4AgL(4)center dot 6AgCF(3)COO center dot 5CH(3)CN (5), 2AgL(S)center dot 4AgCF(3)COO center dot NC(CH2)(4)CN (6), 2AgL(5)center dot 4AgCF(3)COO center dot 2CH(3)CN (7) and AgL6 center dot 2CF(2)(CF2COOAg)(2)center dot 2CH(3)CN (8) (L-1 =4-iodophenylethynide; L-2 = 3,4-dichlorophenylethynide; L-3 = 3-chlorophenylethynide; L-4 = 3-bromophenylethynide; L-5 = 2-chlorophenylethynide; L-6 = 2-fluorophenylethynide) have been synthesised and characterized by X-ray crystallography. All compounds contain the silver-halophenylethynide supramolecular synthon R-X-C C superset of Ag-n (n = 4, 5). In particular, the three-dimensional supramolecular structures in 1 and 2 are stabilized by strong Ag center dot center dot center dot l interactions, while that in 3 is consolidated by both Ag center dot center dot center dot Cl and van der Waals type F center dot center dot center dot Cl interactions. In isomorphous compounds 4 and 5, the presence of respective F center dot center dot center dot Cl or F center dot center dot center dot Br contact contributes to the stability of the network. The silver aggregates in 6, 7 and 8 are stabilized by Ag center dot center dot center dot Cl or Ag center dot center dot center dot F interactions between the ortho-halo substituent and the Ag. basket. (C) 2009 Elsevier Ltd. All rights reserved.