New triply hydroxo-bridged complexes of chromium(III), cobalt(III), and rhodium(III): crystal structure of tris(.mu.-hydroxo)bis[(1,4,7-trimethyl-1,4,7-triazacyclononane)chromium(III)] triiodide trihydrate

Synthesis, Spectroscopic and Structural Systematics of Complexes of Germanium(IV) Halides (GeX4, X = F, Cl, Br or I) with Mono‐, Bi‐ and Tri‐Dentate and Macrocyclic Nitrogen Donor Ligands

“…Me 3 [9]aneN 3 was made as described. [23] 2,2Ј-Bipyridyl, 1,10-phenanthroline, 2,2Ј,6Ј2ЈЈ-terpyridyl and cyclam and Me 4 -cyclam were dried by heating in vacuo. Pyridine was dried by distillation from potassium, and Me 2 N(CH 2 ) 2 NMe 2 and NEt 3 by distillation from BaO.…”

Chromium(III) Complexation to Natural Organic Matter: Mechanisms and Modeling

“…[2][3][4][5][6][7][8] as well as triple hydroxo bridges (d(Cr⋅⋅⋅⋅Cr)=2.67 Å). [9][10][11][12][13][14] There are also examples where dimeric complexes with a single and additionally two carboxylate groups bridging the chromium(III) ions, [15][16][17][18] or double hydro bridge with an additional carboxylate group bridging the chromium(III) ions. [19][20] This causes a slight shortening to 3.50 and 2.90 Å, respectively.…”

A DFT based ligand field model for magnetic exchange coupling in transition metal dimer complexes:

“…1) approximates the coordination geometry of a series of compounds with the same bridging geometry containing cyclic amines as terminal ligands [19]. The octahedral t 2g orbitals of Cr III are split by the local ligand field of C 3v symmetry and give rise to one a 1 (a) and two e(x,y) magnetic orbitals, whose energies and eigenvectors (d-contributions only) are listed in Table 1.…”