Some halo- and (mixed-halo) cuprates of the type (n-MepipzH2)CuXmY4-m (X=Cl; Y=Br; m=4,3,2,1,0; n=1 and 1-MepipzH2=1-methylpiperazinium dication; n=2 and 2-MepipzH2=2-methylpiperazinium dication) and (1-MepipzH·HX)2CuX4 (X=Cl,Br) (1-MepipzH·HX=1-methylpiperazinium monocation hydrohalide) were prepared and characterized by means of spectroscopic, magnetic, differential scanning calorimetric analysis and conductometric measurements. The compounds in the solid state may be divided in two categories: a) the (1-MepipzH2)CuXmY4-m (m=4,3,2,1,0) and (2-MepipzH2)CuXmY4-m (m=1,0) complexes, for which a distorted tetrahedral configuration is suggested from their room-temperature spectroscopic properties; b) the (2-MepipzH2)-CuXmY4-m (m=4,3,2) and (1-MepipzH·HX)2CuX4 complexes, for which an approximately square-planar geometry may be suggested. In particular the (1-MepipzH·HBr)2CuBr4 compound shows a thermochromic behaviour associable with a change in the coordination geometry like all the complexes in N,N′-dimethylformamide solution. The distortion from tetrahedral symmetry of the complexes is discussed on the basis of extensive N-H … X hydrogen bonding interactions, which are proposed as responsible for the planar geometry.

Tetrahalo and (mixed-tetrahalo)cuprates of the 1-methyl- and 2-methyl.pyperazinium dications. Hydrogen bonding effects on the coordination geometry of the CuX4 2- anions / Marcotrigiano, Giuseppe Onofrio; Menabue, Ledi; Pellacani, Gian Carlo. - In: JOURNAL OF COORDINATION CHEMISTRY. - ISSN 0095-8972. - STAMPA. - 9:(1979), pp. 141-149. [10.1080/00958977908076520]

Tetrahalo and (mixed-tetrahalo)cuprates of the 1-methyl- and 2-methyl.pyperazinium dications. Hydrogen bonding effects on the coordination geometry of the CuX4 2- anions.

MARCOTRIGIANO, Giuseppe Onofrio;MENABUE, Ledi;PELLACANI, Gian Carlo
1979-01-01

Abstract

Some halo- and (mixed-halo) cuprates of the type (n-MepipzH2)CuXmY4-m (X=Cl; Y=Br; m=4,3,2,1,0; n=1 and 1-MepipzH2=1-methylpiperazinium dication; n=2 and 2-MepipzH2=2-methylpiperazinium dication) and (1-MepipzH·HX)2CuX4 (X=Cl,Br) (1-MepipzH·HX=1-methylpiperazinium monocation hydrohalide) were prepared and characterized by means of spectroscopic, magnetic, differential scanning calorimetric analysis and conductometric measurements. The compounds in the solid state may be divided in two categories: a) the (1-MepipzH2)CuXmY4-m (m=4,3,2,1,0) and (2-MepipzH2)CuXmY4-m (m=1,0) complexes, for which a distorted tetrahedral configuration is suggested from their room-temperature spectroscopic properties; b) the (2-MepipzH2)-CuXmY4-m (m=4,3,2) and (1-MepipzH·HX)2CuX4 complexes, for which an approximately square-planar geometry may be suggested. In particular the (1-MepipzH·HBr)2CuBr4 compound shows a thermochromic behaviour associable with a change in the coordination geometry like all the complexes in N,N′-dimethylformamide solution. The distortion from tetrahedral symmetry of the complexes is discussed on the basis of extensive N-H … X hydrogen bonding interactions, which are proposed as responsible for the planar geometry.
9
141
149
Tetrahalo and (mixed-tetrahalo)cuprates of the 1-methyl- and 2-methyl.pyperazinium dications. Hydrogen bonding effects on the coordination geometry of the CuX4 2- anions / Marcotrigiano, Giuseppe Onofrio; Menabue, Ledi; Pellacani, Gian Carlo. - In: JOURNAL OF COORDINATION CHEMISTRY. - ISSN 0095-8972. - STAMPA. - 9:(1979), pp. 141-149. [10.1080/00958977908076520]
Marcotrigiano, Giuseppe Onofrio; Menabue, Ledi; Pellacani, Gian Carlo
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/733447
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 10
  • ???jsp.display-item.citation.isi??? 15
social impact