Loops, Chains, Sheets, and Networks from Variable Coordination of Cu(hfac)(2) with a Flexibly Hinged Aminoxyl Radical Ligand


Autoria(s): BASKETT, Martha; Paduan Filho, Armando; Oliveira Junior, Nei Fernandes de; CHANDRASEKARAN, A.; MAGUE, Joel T.; LAHTI, Paul M.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

20/10/2012

20/10/2012

2011

Resumo

One pair of reactants, Cu(hfac)(2) = M and the hinge-flexible radical ligand 5-(3-N-tert-butyl-N-aminoxylphenyl)pyrimidine (3PPN = L), yields a diverse set of five coordination complexes: a cyclic loop M(2)L(1) dimer; a 1:1 cocrystal between an M(2)L(2) loop and an ML(2) fragment; a ID chain of M(2)L(2) loops linked by M; two 2D M(3)L(2) networks of (M-L)(n) chains crosslinked by M with different repeat length pitches; a 3D M(3)L(2) network of M(2)L(2) loops cross-linking (M-L)(n)-type chains with connectivity different from those in the 2D networks. Most of the higher dimensional complexes exhibit reversible, temperature-dependent spin-state conversion of high-temperature paramagnetic states to lower magnetic moment states having antiferromagnetic exchange within Cu-ON bonds upon cooling, with accompanying bond contraction. The 3D complex also exhibited antiferromagnetic exchange between Cu(II) ions linked in chains through pyrimidine rings.

U.S. National Science Foundation (NSF)[CHE-0109094]

U.S. National Science Foundation (NSF)

U.S. National Science Foundation (NSF)[CHE-0415716]

U.S. National Science Foundation (NSF)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) in Brazil

Louisiana Board of Regents

Louisiana Board of Regents[2003-ENH-TR-67]

Identificador

INORGANIC CHEMISTRY, v.50, n.11, p.5060-5074, 2011

0020-1669

http://producao.usp.br/handle/BDPI/29374

10.1021/ic200362c

http://dx.doi.org/10.1021/ic200362c

Idioma(s)

eng

Publicador

AMER CHEMICAL SOC

Relação

Inorganic Chemistry

Direitos

restrictedAccess

Copyright AMER CHEMICAL SOC

Palavras-Chave #TRANSITION-METAL DICATIONS #COPPER(II) HEXAFLUOROACETYLACETONATE #INTERCLUSTER EXCHANGE #MAGNETIC-PROPERTIES #NITRONYL NITROXIDE #CRYSTAL-STRUCTURES #MOLECULAR MAGNETS #SPIN-CROSSOVER #COMPLEXES #BIS(HEXAFLUOROACETYLACETONATO)MANGANESE(II) #Chemistry, Inorganic & Nuclear
Tipo

article

original article

publishedVersion