Hexakis(N,N-dimethylformamide-κO)magnesium tetrachloromagnesate

Abstract

Key indicatorsSingle-crystal X-ray study T = 120 K Mean (l-Mg) = 0.001 Å R factor = 0.035 wR factor = 0.068 Data-to-parameter ratio = 11.4For details of how these key indicators were automatically derived from the article, see

Structural diversity and spectral and thermal properties of the first alkaline earth metal tetracyanidoborates: [Mg(H2O)6][B(CN)4]2, [Mg(H2O)2][B(CN)4]2, [Mg(DMF)6][B(CN)4]2, [Ca(H2O)3][B(CN)4]2, and [Ca(H2O)2(CH3CN)][B(CN)4]2

“…The Mg-O distances vary between 2.0483(6) and 2.0689(7) Å (average 2.0592 Å) with O-Mg-O angles ranging from 88.32(4)°t o 91.67(4)°. These distances and angles compare very well 24 Direct coordination between the cyanido nitrogen atoms and the magnesium(II) ions or hydrogen bonding is not observed in 3, but, nevertheless, the tetracyanidoborate anion is slightly distorted in this compound (C-B-C range : 107.85°-110.72°, see Table 3). The reason for the distortion could be van der Waals interactions of different strengths between the cyanido groups and the surrounding DMF molecules.…”

Magnesium Bonds: From Divalent Mg Centres to Trigonal and Tetrahedral Coordination

“…This is far from the typical tetrahedral structure (109.5°). However it is worth mentioning that few crystal structures are known where the MgCl 4 2− anions exist which are characterized by the tetrahedral structure of the approximately T d symmetry; the crystal structure of hexakis(dimethylformamide‐κO)magnesium tetrachloromagnesium is an example described in literature . Also the ωB97XD/aug‐cc‐pVTZ calculations performed on the MgCl 4 2− and Mg(NCH) 4 2+ species show their T d symmetry with the equivalent Mg…Cl − and Mg 2+ …NCH interactions, respectively.…”

Crystal structure of magnesium(II) diaquatetracarbamidenitrate

“…The structural variety of magnesium(II) complexes with carbamide type ligands prepared from water-organic systems may be reduced to a few species that are conventionally described as [Mg(H 2 O) 2 (ur) 4 ] 2+ [1] and [Mg(ur) 6 ] 2+ [2][3][4][5]. We have also described a compound which con tains both [Mg(ur) 6 ] 2+ and [Mg(H 2 O) 4 (ur) 2 ] 2+ cations [6], where the apical arrangement of the carbamide type ligand is characteristic of the latter.…”