Novel iron(II) complexes with 1,2,4-triazole and 4-amino-1,2,4-triazole possessing the (1)A(1)reversible arrow T-5(2) spin transition

Authors
Lavrenova, LG Shakirova, OG Shvedenkov, YG Ikorskii, VN Varnek, VA Sheludyakova, LA Larionov, SV
Citation
Lg. Lavrenova et al., Novel iron(II) complexes with 1,2,4-triazole and 4-amino-1,2,4-triazole possessing the (1)A(1)reversible arrow T-5(2) spin transition, RUSS J C CH, 25(3), 1999, pp. 192-197
Citations number
18
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
RUSSIAN JOURNAL OF COORDINATION CHEMISTRY
ISSN journal
10703284 → ACNP
Volume
25
Issue
3
Year of publication
1999
Pages
192 - 197
Database
ISI
SICI code
1070-3284(199903)25:3<192:NICW1A>2.0.ZU;2-I
Abstract
New iron(II) complexes with 1,2,4-triazole (TR) and 4-amino-1,2,4-triazole (ATR), Fe(TP)(3)SiF6 . H2O (I) and Fe(ATP)(3)SiF6 (II), were synthesized. A ccording to magnetochemical measurements, both compounds possess the (1)A(1 ) reversible arrow T-5(2) spin transition. In II, this transition is sharp though incomplete. The temperatures of the direct (T(c)up arrow) and revers e (T(c)down arrow) transitions are 254.5 and 241 K, respectively; Delta T-c = 13.5 K. The mu(eff)(T) curve points to a high residual content of the hi gh-spin form of the complex at low temperatures. In I, the transition is le ss sharp and occurs at a high temperature (T(c)up arrow approximate to 380 K).