The dinuclear complex [{Pd(dmpz)(2)(Hdmpz)(2)}(2)] (Hdmpz = 3,5-dimethylpyrazole) has been synthesized and its solid-state structure determined by X-ray methods. Each dimeric molecule, of idealized 422 symmetry, possesses four strong intramolecular hydrogen bonds, equalizing the Hdmpz and dmpz ligands. The complex has been treated with AgNO3 and [Cu(MeCN)(4)]BF4, in search of heterobimetallic derivatives; [{PdCu2(dmpz)(4)}(2)] and [{PdAg2(dmpz)(4)}(2)] species have been isolated. The latter, characterized by X-ray methods, is anon-bonded octahedral cluster (trans Pd2Ag4) bridged by eight dihapto dmpz ligands, thus formally deriving from its precursor by substitution of four H+ by Ag+ ions. This increases the Pd ... Pd distance from 3.746(1) to 5.160(1) Angstrom, and slightly changes the ligand conformation.
Ardizzoia, G., Lamonica, G., Cenini, S., Moret, M., Masciocchi, N. (1996). Polynuclear pyrazolato complexes. Synthesis, chemical reactivity and crystal structures of [{Pd(dmpz)(2)(Hdmpz)(2)}(2)] and [{PdAg2(dmpz)(4)}(2)] (Hdmpz=3,5-dimethylpyrazole). JOURNAL OF THE CHEMICAL SOCIETY DALTON TRANSACTIONS(7), 1351-1357 [10.1039/dt9960001351].
Polynuclear pyrazolato complexes. Synthesis, chemical reactivity and crystal structures of [{Pd(dmpz)(2)(Hdmpz)(2)}(2)] and [{PdAg2(dmpz)(4)}(2)] (Hdmpz=3,5-dimethylpyrazole)
MORET, MASSIMO;
1996
Abstract
The dinuclear complex [{Pd(dmpz)(2)(Hdmpz)(2)}(2)] (Hdmpz = 3,5-dimethylpyrazole) has been synthesized and its solid-state structure determined by X-ray methods. Each dimeric molecule, of idealized 422 symmetry, possesses four strong intramolecular hydrogen bonds, equalizing the Hdmpz and dmpz ligands. The complex has been treated with AgNO3 and [Cu(MeCN)(4)]BF4, in search of heterobimetallic derivatives; [{PdCu2(dmpz)(4)}(2)] and [{PdAg2(dmpz)(4)}(2)] species have been isolated. The latter, characterized by X-ray methods, is anon-bonded octahedral cluster (trans Pd2Ag4) bridged by eight dihapto dmpz ligands, thus formally deriving from its precursor by substitution of four H+ by Ag+ ions. This increases the Pd ... Pd distance from 3.746(1) to 5.160(1) Angstrom, and slightly changes the ligand conformation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.