Abstract
The reaction of one equivalent Co(NCS)2 with four equivalents of urotropine (hexa-methyl-ene-tetra-mine) in ethanol leads to the formation of two compounds, namely, bis-(ethanol-κO)bis-(thio-cyanato-κN)bis-(urotropine-κN)cobalt(II), [Co(NCS)2(C6H12N4)2(C2H6O)2] (1), and tetra-kis-(ethanol-κO)bis-(thio-cyanato-κN)cobalt(II)-urotropine (1/2), [Co(NCS)2(C2H6O)4]·2C6H12N4 (2). In 1, the Co cations are located on centers of inversion and are sixfold coordinated by two terminal N-bonded thio-cyanate anions, two ethanol and two urotropine ligands whereas in 2 the cobalt cations occupy position Wyckoff position c and are sixfold coordinated by two anionic ligands and four ethanol ligands. Compound 2 contains two additional urotropine solvate mol-ecules per formula unit, which are hydrogen bonded to the complexes. In both compounds, the building blocks are connected via inter-molecular O-H⋯N (1 and 2) and C-H⋯S (1) hydrogen bonding to form three-dimensional networks.
Highlights
The reaction of one equivalent Co(NCS)2 with four equivalents of urotropine in ethanol leads to the formation of two compounds, namely, bis(ethanol-O)bis(thiocyanato-N)bis(urotropine-N)cobalt(II), [Co(NCS)2(C6H12N4)2(C2H6O)2] (1), and tetrakis(ethanol-O)bis(thiocyanatoN)cobalt(II)–urotropine (1/2), [Co(NCS)2(C2H6O)4]Á2C6H12N4 (2)
In 1, the Co cations are located on centers of inversion and are sixfold coordinated by two terminal N-bonded thiocyanate anions, two ethanol and two urotropine ligands whereas in 2 the cobalt cations occupy position Wyckoff position c and are sixfold coordinated by two anionic ligands and four ethanol ligands
The synthesis of bridging compounds with the former cations is sometimes difficult to achieve, which is a pity, because such compounds are of interest due to their magnetic properties (Mautner et al, 2018; Mekuimemba et al, 2018; Mousavi et al, 2020; Palion-Gazda et al, 2015; Suckert et al, 2016). This is especially the case with cobalt, which frequently exhibits interesting behavior due to its large magnetic anisotropy, so we and others have been studying such compounds for several years (Shi et al, 2006; Jin et al, 2007; Wellm et al, 2020; Prananto et al, 2017). Within this project we are interested for example in the influence of the co-ligand on the magnetic anisotropy and the magnetic behavior of compounds, in which the cations are linked by thiocyanate anions into chains (Bohme et al, 2020; Rams et al, 2020; Ceglarska et al, 2021; Werner et al, 2014, 2015)
Summary
Thiocyanate anions are versatile ligands that exhibit a variety of coordination modes, leading to rich structural chemistry (Nather et al, 2013). The synthesis of bridging compounds with the former cations is sometimes difficult to achieve, which is a pity, because such compounds are of interest due to their magnetic properties (Mautner et al, 2018; Mekuimemba et al, 2018; Mousavi et al, 2020; Palion-Gazda et al, 2015; Suckert et al, 2016) This is especially the case with cobalt, which frequently exhibits interesting behavior due to its large magnetic anisotropy, so we and others have been studying such compounds for several years (Shi et al, 2006; Jin et al, 2007; Wellm et al, 2020; Prananto et al, 2017). The reason for this observation is unclear, but it might be that 2 is unstable and transforms into a new phase on grinding
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
