Neodymium Hexacyanocobaltate(III) Tetrahydrate

A Study of Several Mixed Cationic Systems of (Pr/La)Co(CN)6·5H2O

“…Also, the cobalticynaides of Ce, Pr, and Nd can crystallize in both hexagonal and orthorhombic lattices. Single-crystal X-ray analyses confirmed these conclusions (5)(6)(7)(8).…”

“…In the present work, structural data for the titled compounds of interest are presented to provide a basis for future solid-state chemical studies dealing with structure integration and association of diverse cations so as to develop a better understanding of semipermeable membranes. Further, due to keen interest in controlled hydration of zeolitic type complexes, synthesis of mixed lanthanide transtion hexacyanides will be continued (7,8 Conoscopic examinations of single crystals of I, II, and III verified the uniaxial nature (birefringent) of each complex. Crystal rotation between two crossed polarizers on a Zeiss Photomicroscope II was used for the optical surveys.…”

Vibrational Properties of [FeH(N2)(depe)2]+ and [FeCl(N2)(depe)2]+]: Dinitrogen Bonding in the Low Activation Limit

“…However, taking into account the Fe-N bond length, their magnitude is not unexpected: ordinary Fe II low-spin compounds coordinated to backbonding nitrogen-coordinating ligands, with an average Fe-N distance of 2.0 Å , exhibit Fe-N force constants of about 1.95 mdyn/Å [29]. Shorter metal-ligand bond lengths are present in the [Fe(CN) 6 ] 2Ϫ anion which, with an average Fe-C bond distance of about 1.9 Å [30], exhibits an Fe-C force constant of 2.4 mdyn/Å [31]. It is therefore not unreasonable that 1 and 2 with an even shorter bond distance of 1.8 Å exhibit an Fe-N force constant of about 2.6 mdyn/Å .…”

The symmetry analysis and magnetic model of Dy[Fe(CN)6]·4D2O

“…The hexagonal crystal structure was confirmed for the single crystal of La[Fe(CN) 6 ]·5H 2 O [1] and orthorhombic crystal structure was determined for the Sm[Fe(CN) 6 ]·4H 2 O [2,3]. Details of the crystal structure of Ln[Fe(CN) 6 ]·nH 2 O compounds were discussed by Mullica et al [4,5], Yukawa et al [6], Wang et al [7], Kavečanský et al [8] and Langer et al [9]. A detailed analysis of Pr[Fe(CN) 6 ]·5H 2 O revealed that the single crystal showing a pseudo-hexagonal symmetry is in reality twinned with three components having Cmcm orthorhombic type of symmetry [9].…”