Synthesis and magnetic properties of decamethylmetallocenium salts of the monoanionic complex [Ni(tds)(2)](-)

Authors
Da Gama, V Rabaca, S Ramos, C Belo, D Santos, IC Duarte, MT
Citation
V. Da Gama et al., Synthesis and magnetic properties of decamethylmetallocenium salts of the monoanionic complex [Ni(tds)(2)](-), MOL CRYST A, 334, 1999, pp. 793-802
Citations number
22
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS
ISSN journal
1058725X → ACNP
Volume
334
Year of publication
1999
Part
2
Pages
793 - 802
Database
ISI
SICI code
1058-725X(1999)334:<793:SAMPOD>2.0.ZU;2-Q
Abstract
The synthesis and magnetic properties of [M(Cp*)(2){Ni(tds)(2)}], M=Fe, Mn and Cr; tds = bis(trifluoromethyl)ethylenediselenato, are reported. The cry stal structure for these compounds consists of an array of parallel stacks of alternating cations, [M(Cp*)(2)](+), and anions, [Ni(tds)2](-), ..D(+)A( -)D(+)A(-)D(+)A(-)... For [Fe(Cp*)(2)][Ni(tds)(2)] and [Mn(Cp*)2][Ni(tds)(2)] the magnetic behavi or is dominated by FM interactions, with theta values of 10.6 and 24.6 K re spectively, while for [Cr(Cp*)(2)][Ni(tds)(2)] the magnetic behavior is dom inated by AFM interactions, with theta = -86.4 K. [Mn(Cp*)(2)][Ni(tds)(2)], at low temperatures, shows a metamagnetic behavior, with TN = 2.1 K and Hc = 60 G.