N,N′-Bis(3-bromobenzylidene)ethane-1,2-diamine

Abstract

The mol­ecule of the title Schiff base compound, C16H14Br2N2, lies across a crystallographic inversion centre. The C=N bond adopts a trans configuration. The imino group is coplanar with the benzene ring. Within the mol­ecule, the planar units are parallel, but extend in opposite directions from the dimethyl­ene bridge. The inter­esting feature of the structure is the weak Br⋯Br inter­action [3.7501 (2) Å] linking the mol­ecules into chains along the c axis. These chains are stacked along the b axis.

N,N′-Bis(3-methoxybenzylidene)ethane-1,2-diamine

“…Many Schiff base complexes have been structurally characterized, but in comparison only a relatively small number of free Schiff bases have been described (Calligaris & Randaccio, 1987). As an extension of our work (Fun et al, 2008a(Fun et al, , 2008b(Fun et al, , 2008c(Fun et al, , 2008d on the structural characterization of Schiff base compounds, the title compound (I), (Fig. 1), is reported here.…”

Synthesis, spectroscopic studies and crystal structures of ReI(CO)3(NN)Cl complexes with N,N′-bis(substituted benzylidene)ethane-1,2-diamine Schiff base ligands

“…Due to the p-donor character induced by the coordinated chloride ligand, the Re-C linkages trans to the Re-Cl linkages are slightly longer than those trans to the Re-N linkages. The C=N bond distance values in the complexes are slightly longer than those observed in free Schiff base ligands [28][29][30]. As commonly observed in previously characterized Re(I)-tricarbonyl diimine systems [31][32][33], the N-Re-N bond angles are found to be less than 90°as required by the steric requirements of chelating ligands.…”

1,3-Bis[(4-nitrobenzylidene)aminooxy]propane

“…Hence, the title compound should be stable enough to resist the metathesis of the C=N bonds. Many bisdentate Schiff base compounds have been structurally characterized (Fun et al, 2008a;Fun et al, 2008b;Kia et al, 2009), but only a relatively small number of bisoxime compounds have had their X-ray structures reported (Shi et al, 2007;Ren et al, 2008). As an extension of our work (Ding et al, 2009;Dong et al, 2008a) on the structural characterization of bisoxime compounds, the title compound, is reported here (Fig.…”