Zinc(ii), cobalt(ii) and manganese(ii) networks with phosphoserine ligand: synthesis, crystal structures and magnetic and proton conductivity properties

A series of zinc(II), cobalt(II) and manganese(II) coordination networks with phosphoserine ligand (H3PSer) are synthesized and characterized. Whereas in compounds 1 and 2 with the general formula [M(HPser)]n [M = Zn (1) and Co (2)], the metal(II) ion presents a tetrahedral geometry, in [Co(HPSer)(H2O)2]n (3) and [Mn(HPSer)(H2O)]n (4), the metal(II) ions are in a distorted octahedral geometry. The 3D frameworks are formed by inorganic layers built up from MO4 or MO6 polyhedra and phosphate groups. These layers are linked by the carboxylate groups of the phosphoserine ligand. The presence of extended hydrogen bonding stabilizes the 3D network and favours the proton transfer leading to modera…

Influence of the pyrazine substituent on the structure and magnetic properties of dicyanamide-bridged cobalt(ii) complexes.

Substituted pyrazines were successfully used to prepare two new coordination polymers of formulas {[Co(dca)2(NH2pyz)2]·H2O}n (1) and [Co3(dca)6(HOpyz)5(H2O)2]n (2) [dca = dicyanamide, NH2pyz = 2-aminopyrazine and HOpyz = 2-hydroxypyrazine] whose structures were determined by single-crystal X-ray crystallography. The structure of 1 consists of a two-dimensional rhombus grid of cobalt(II) ions where the dca ligand adopts the μ1,5 bridging mode with trans-positioned monodentate NH2pyz molecules completing the six-coordination around each metal ion. Compound 2 exhibits a stair-like two-dimensional structure where the intralayer connections are performed by the dca and HOpyz groups exhibiting μ1…

Magneto-structural diversity of Co(ii) compounds with 1-benzylimidazole induced by linear pseudohalide coligands

We report the preparation, spectroscopic characterisation, crystal structure determination and cryomagnetic investigation of three cobalt(II) complexes of formula trans-[Co(bim)4(NCS)2] (1), [Co(bim)2(NCO)2] (2) and [Co(bim)2(N3)2]n (3) (bim = 1-benzylimidazole). The structure of 1 is made up of neutral [Co(bim)4(NCS)2] mononuclear units, where the cobalt(II) ion is six-coordinate with four monodentate bim ligands in equatorial positions and two N-thiocyanato groups in the axial sites building a slightly compressed octahedron. In contrast to 1, each cobalt(II) ion in 2 is four-coordinate with two imidazole-nitrogen atoms from two bim molecules and two N-cyanato ligands describing a slightly…

A Study of the Lack of Slow Magnetic Relaxation in Mononuclear Trigonal Bipyramidal Cobalt(II) Complexes

CCDC 1572981: Experimental Crystal Structure Determination

Related Article: A. Świtlicka, B. Machura, R. Kruszynski, J. Cano, L. M. Toma, F. Lloret, M. Julve|2018|Dalton Trans.|47|5831|doi:10.1039/C7DT04735E

CCDC 1567558: Experimental Crystal Structure Determination

Related Article: J. Vallejo, I. R. Salcedo, R. M. P. Colodrero, A. Cabeza, A. Świtlicka, J. Cano, M. Viciano-Chumillas|2017|Dalton Trans.|46|16570|doi:10.1039/C7DT03474A

CCDC 1567557: Experimental Crystal Structure Determination

Related Article: J. Vallejo, I. R. Salcedo, R. M. P. Colodrero, A. Cabeza, A. Świtlicka, J. Cano, M. Viciano-Chumillas|2017|Dalton Trans.|46|16570|doi:10.1039/C7DT03474A

CCDC 1567559: Experimental Crystal Structure Determination

Related Article: J. Vallejo, I. R. Salcedo, R. M. P. Colodrero, A. Cabeza, A. Świtlicka, J. Cano, M. Viciano-Chumillas|2017|Dalton Trans.|46|16570|doi:10.1039/C7DT03474A

CCDC 1563742: Experimental Crystal Structure Determination

Related Article: J. Vallejo, I. R. Salcedo, R. M. P. Colodrero, A. Cabeza, A. Świtlicka, J. Cano, M. Viciano-Chumillas|2017|Dalton Trans.|46|16570|doi:10.1039/C7DT03474A

CCDC 1572980: Experimental Crystal Structure Determination

Related Article: A. Świtlicka, B. Machura, R. Kruszynski, J. Cano, L. M. Toma, F. Lloret, M. Julve|2018|Dalton Trans.|47|5831|doi:10.1039/C7DT04735E

CCDC 1572982: Experimental Crystal Structure Determination

Related Article: A. Świtlicka, B. Machura, R. Kruszynski, J. Cano, L. M. Toma, F. Lloret, M. Julve|2018|Dalton Trans.|47|5831|doi:10.1039/C7DT04735E