Tris(1,10-phenanthroline-κ²N,N′)iron(II) bis(1,1,3,3-tetracyano-2-ethoxypropenide) hemihydrate

Abstract

In the title hydrated mol­ecular salt, [Fe(C12H8N2)3](C9H5N4O)2·0.5H2O, the water mol­ecule site is half-occupied. The Fe—N bond lengths within the octa­hedral tris-chelate [Fe(phen)3]2+ ion (phen is 1,10-phenantroline) are indicative of a low-spin d 6 electronic configuration for the metal ion. The C—N, C—C and C—O bond lengths in the polynitrile anions indicate extensive electronic delocalization. In the crystal, the components are linked through O—H⋯N hydrogen bonds, forming [100] chains, as well as through Coulombic inter­actions.

Poly[[chlorido(1,10-phenanthroline-κ2N,N′)copper(II)]-μ3-1,1,3,3-tetracyano-2-ethoxypropenido-κ3N:N′:N′′]: coordination polymer sheets linked into bilayers by hydrogen bonds

“…The bond lengths in the tcnoet ligand are very similar to those found in uncoordinated tcnoet anions in the hemihydrate salt [Fe(phen) 3 ](tcnoet) 2 Á0.5H 2 O, (II) (Setifi et al, 2013). In this salt, there are two independent anions, neither of which participates in any metal coordination; one of them acts as the acceptor in two independent O-HÁ Á ÁN hydrogen bonds and the other is free from direction-specific intermolecular interactions.…”

1,1′-Diethyl-4,4′-bipyridine-1,1′-diium bis(1,1,3,3-tetracyano-2-ethoxypropenide): multiple C—H...N hydrogen bonds form a complex sheet structure

“…The two pyridine rings in the cation are constrained to be parallel but, in the anion, the two independent -C(CN) 2 units are rotated, in conrotatory fashion, out of the plane of the central propenide unit. The dihedral angles between the central C 3 unit and the -C(CN) 2 units containing atoms C11 and C13 are 16.0 (2) and 23.0 (2) , respectively; these values, and the sense of the rotations, are typical of those observed in other systems containing this anion (Setifi et al, 2013(Setifi et al, , 2014. Within the anion, the two central C-C distances ( Table 2) are very similar, while the four independent C-N distances are all the same within experimental uncertainty, and they are long for their type [mean value (Allen et al, 1987) = 1.136 Å , upper quartile value = 1.142 Å ].…”

Synthesis, structure, and magnetic properties of a dinuclear antiferromagnetically coupled iron(II) complex

“…On the other hand the distances to the pyridyl N atoms in 1 are ca. 0.2 Å longer than those corresponding Fe-N distances in the low-spin Fe(II) complexes[27] which are closely clustered around 1.97Å. On this basis, we deduce from the structural metrics that at ambient temperature complex 1 adopts a high-spin configuration, corresponding in approximate octahedral microsymmetry to a 5 T 2g state.The Fe...Fe distance within the centrosymmetric complex is 8.293(8) Å.…”