2003
DOI: 10.1021/ic034126j
|View full text |Cite
|
Sign up to set email alerts
|

Synthesis, Crystal Structure, Magnetic Properties, and Theoretical Studies of [{Cu(mepirizole)Br}2(μ-OH)(μ-pz)] (Mepirizole = 4-Methoxy-2-(5-methoxy-3-methyl-1H-pyrazol-1-yl)-6-methylpyrimidine; pz = Pyrazolate), a Novel μ-Pyrazolato−μ-Hydroxo-Dibridged Copper(II) Complex

Abstract: A novel mu-pyrazolato-mu-hydroxo-dibridged copper(II) complex has been synthesized and structurally characterized: [(Cu(mepirizole)Br)2(mu-OH)(mu-pz)] (mepirizole=4-methoxy-2-(5-methoxy-3-methyl-1H-pyrazol-1-yl)-6-methylpyrimidine; pz=pyrazolate). The title compound crystallizes in the monoclinic system, space group P2(1)/c, with a=15.618(2) A, b=15.369(3) A, c=16.071(3) A, and beta=112.250(1) degrees. The structure is built up of dinuclear [(Cu(mepirizole)Br)2(mu-OH)(mu-pz)] units with five-coordinated copper… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1

Citation Types

2
17
0

Year Published

2005
2005
2020
2020

Publication Types

Select...
9

Relationship

0
9

Authors

Journals

citations
Cited by 39 publications
(19 citation statements)
references
References 96 publications
2
17
0
Order By: Relevance
“…The bond parameters for the N 3 /m-O/syn-syn-CO 3 2À pathway are very close to those found in 1-6 and by comparison, ferromagnetic coupling, parametrized as J 1 ,s hould be assigned univocally to this pathway.D FT calculations show that the predicted interaction mediated by end-on azido bridges in Ni II complexes is ferromagnetic, with am aximum positive value aroundaNi-N-Ni bond angle of 1048. [11,34] 1,2-Diazines promote antiferromagnetic interactions [35][36][37] and they are counter-complementary [38] with the azido or oxo bridges reducing the ferromagnetic interactions. and thus, the combination of the weaker ferromag-netic component promoted by the azido bridge with aN i-N-Ni bond angle around 918 (Table 1), with the counter-complementary pyrazolate bridgea gree with the antiferromagnetic character of the m 1,1 -N 3 /m-O/syn-syn-Pz À pathway parametrized as J 2 .T his observation shows the very fine details that determine the magnetic properties in polynuclear clusters, as the seemingly minor change from pyrazolate ligands to acetato ligands (from ref.…”
Section: Magnetic Propertiesmentioning
confidence: 99%
“…The bond parameters for the N 3 /m-O/syn-syn-CO 3 2À pathway are very close to those found in 1-6 and by comparison, ferromagnetic coupling, parametrized as J 1 ,s hould be assigned univocally to this pathway.D FT calculations show that the predicted interaction mediated by end-on azido bridges in Ni II complexes is ferromagnetic, with am aximum positive value aroundaNi-N-Ni bond angle of 1048. [11,34] 1,2-Diazines promote antiferromagnetic interactions [35][36][37] and they are counter-complementary [38] with the azido or oxo bridges reducing the ferromagnetic interactions. and thus, the combination of the weaker ferromag-netic component promoted by the azido bridge with aN i-N-Ni bond angle around 918 (Table 1), with the counter-complementary pyrazolate bridgea gree with the antiferromagnetic character of the m 1,1 -N 3 /m-O/syn-syn-Pz À pathway parametrized as J 2 .T his observation shows the very fine details that determine the magnetic properties in polynuclear clusters, as the seemingly minor change from pyrazolate ligands to acetato ligands (from ref.…”
Section: Magnetic Propertiesmentioning
confidence: 99%
“…( S )-3-Pyrazolylalanine [23], lonazolac [24], difenamizole [25], mepirizole [26], metamizol [27] and 4,5-dihydro-3-phenyl-6 H -pyrrolo[1,2-b]pyrazole are some of the biologically active compounds endowed with antimicrobial [28], hypoglycaemic [29] and non-nucleoside HIV-1 reverse transcriptase inhibitor properties [30]. …”
Section: Introductionmentioning
confidence: 99%
“…These compounds can act as ligands for the synthesis of coordination compounds because of the presence of donor atoms (Gomez de la Torre et al, 2000, and references therein; Escriva et al, 2003, and references therein;Elguero et al, 2001, and references therein). By varying the number and the position of the substituents in the pyrazolylpyrimidines, coordination compounds with catalytic (Druzhkov et al, 2004) or interesting magnetic properties (Escriva et al, 2003) can be obtained. Pyrazolylpyrimidines are also very appealing ligands in the design of spin-crossover systems similar to those obtained earlier with the related azine systems pyrazolylpyrazines and pyrazolylpyridines (Money et al, 2004, and references therein).…”
Section: Introductionmentioning
confidence: 99%