Mononuclear Dysprosium Thiocyanate Complexes with 2,2′‐Bipyridine and 1,10‐Phenanthroline: Synthesis, Crystal Structures, SIM Behavior, and Solid‐Phase Transformations

Abstract

Five new dysprosium complexes were synthesized and characterized: neutral Dy(NCS) 3 ·6(H 2 O) (1), [Dy(NCS) 3 (H 2 O)-(bpy) 2 ]·0.5(bpy)·H 2 O (2), and [Dy(NCS) 3 (H 2 O)(phen) 2 ]·phen· 0.5H 2 O (3), as well as ionic [Hbpy][Dy(NCS) 4 (bpy) 2 ]·H 2 O (4) and [Hphen][Dy(NCS) 4 (phen) 2 ] (5). In all complexes, the metal coordination number (CN) is 8. All complexes exhibit single-ion [a] N.

Discrete [Yb(NCS)3(H2O)5] Molecules in Pentaaquatriisothiocyanatoytterbium(III) Monohydrate

“…[Yb(NCS) 3 (H 2 O) 5 ] · H 2 O is the thiocyanate‐hydrate representative with the smallest rare‐earth metal(III) cation synthesized and structurally characterized up until now. It crystallizes isotypically to the literature‐known examples [ RE (NCS) 3 (H 2 O 5 )] · H 2 O with RE = Y, Eu, Tb and Dy, but differs from previous reports for compounds such as RE (NCS) 3 · 7H 2 O ( RE = Pr and Dy). The vibrational spectra of the title compound confirm the presence of thiocyanate anions (SCN) – grafting via their nitrogen atoms and coordinating water molecules.…”

“…The vibrational frequencies obtained from the ATR‐FT infrared and the single‐crystal Raman spectra of [Yb(NCS) 3 (H 2 O) 5 ] · H 2 O (Figure ) compare well to the frequencies for the free (SCN) – anion, [Dy(NCS) 3 (H 2 O) 5 ] · H 2 O and the related bismuth(III) thiocyanate hemihydrate Bi(NCS) 3 · 1 / 2 H 2 O (Table ). However, in the range from 990 to 1200 cm –1 in the ATR‐FTIR spectrum vibrational modes of Ba(SO 4 ) impurities seem to be present…”

“…The ATR‐FT infrared spectrum was obtained by introducing powdered material of the title compound in a nitrogen‐filled glove box into the beam of a Nicolet iS5‐FTIR spectrometer (Thermo Fisher Scientific, Waltham, MA, USA) equipped with an attenuated total reflection unit. The combined vibrational spectra of [Yb(NCS) 3 (H 2 O) 5 ] · H 2 O are displayed in Figure , whereas Table contains the exact frequencies and their assigned modes compared to data of the free thiocyanate anion in aqueous solution, [Dy(NCS) 3 (H 2 O) 5 ] · H 2 O and Bi(NCS) 3 · 1 / 2 H 2 O.…”

“…In 2017 the dysprosium compound was prepared and its structure determined unambiguously as [Dy(NCS) 3 (H 2 O) 5 ] · H 2 O. In addition, it was further investigated alongside other thiocyanato complexes with various non‐aqueous ligands mainly due to their single‐cation magnetic properties …”

Synthesis, Crystal Structures and Properties of Polymorphic and Isomeric Nickel(II)thiocyanate Coordination Compounds with 3‐Bromopyridine as Coligand

“…There is a problem in numbering which was solved.Coordination compounds based on thiocyanate anions have attracted much interest in recent years, which can partly be traced back due to their versatile coordination behaviour leading to structures of different dimensionality. [1][2][3][4][5][6][7][8][9][10][11][12][13] In most compounds the anionic ligands are only terminal N-bonded to the metal cations, whereas the synthesis of compounds with bridging thiocyanate ligands is sometimes more complicated if less chalcophilic paramagnetic 3d metal cations are used. This is a pity, because this ligand is able to mediate reasonable magnetic exchange leading to compounds that can show different magnetic properties.…”