Synthesis, crystal and molecular structure, and magnetic properties of bis[(.mu.-3,5-diamino-1,2,4-triazole-N1,N2-bis(.mu.-3,5-diamino-1,2,4-triazolato-N1,N2)triaquacobalt(II))]cobalt(III) trichloride nonahydrate

Abstract

20) Vreugdenhil, W.; Haasnoot, J. G.; Schoondergang, M. F. J.; Reedijk, J. Inorg. Chim. Acta 1987, 130, 235 and references quoted therein. IntroductionHundreds of different icosahedral closo-carborane( 12) derivatives containing boron-element bonds (element = halogen, nitrogen, carbon, oxygen, sulfur, main-group and transition metals, etc.) have been synthesized over the last 25-30 years.l Direct electrophilic chlorination, bromination, and iodination is known to be an effective and convenient method for the preparation of boron halogenated 0-, m-, and p-carboranes2 Similarly, selective

A CuII Chain Compound Showing a Ferromagnetic Coupling through Triple N1,N2‐1,2,4‐Triazole Bridges

“…The g factor must be considered as an average value of the local Zeeman factors and intercluster exchange interactions were supposed to be negligible. [28] trinuclear clusters, where the central metal ion is diamagnetic, and no magnetic interactions could be detected between the paramagnetic terminal metal ions. A good fit in the temperature range 2Ϫ100 K has been obtained for the parameters g ϭ 2.20(1) and J ϭ ϩ1.45(3) cm Ϫ1 (see Figure 3).…”

Coordinative Versatility of Guanazole [3,5‐Diamino‐1,2,4‐triazole]: Synthesis, Crystal Structure, EPR, and Magnetic Properties of a Dinuclear and a Linear Trinuclear Copper(II) Complex Containing Small Bridges and Triazole Ligands

“…-) units: one with Co(II,III) [13] and three with Ni II . [14][15][16] No dinuclear structures have been reported.…”

“…[1,17] In the aforementioned structures, guanazole is known to coordinate in three different ways, either unidentate through N1, or bridging-bidentate through N1,N2 or N2,N4. Moreover, Hdatrz can occur in three different chemical forms, namely neutral (in most cases), anionic (with deprotonation at N4), [13] or cationic (with protonation at N2). [8] Especially interesting is the compound [Co 3 -(datrz) 2 (Hdatrz) 4 (H 2 O) 6 ]Cl 3 ·9H 2 O, which includes mixed valences of cobalt ions and triazole/triazolate mixed ligand bridges.…”

Synthesis, Crystal Structure, Spectroscopic and Magnetic Properties of an Unprecedented Three-Dimensional CuII Coordination Compound of 1,2-Bis(1,2,4-triazol-4-yl)ethane

“…ϪFe II [30] and Co II ϪCo II ϪCo II [48] trinuclear clusters, where the central metal ion is diamagnetic, and no magnetic inter-actions could be detected between the paramagnetic terminal metal ions. In Equation 1, N, g, β, k, and T have their usual meanings.…”