Reza Kia

Bio: Reza Kia is an academic researcher from Universiti Sains Malaysia. The author has contributed to research in topics: Ring (chemistry) & Dihedral angle. The author has an hindex of 10, co-authored 93 publications receiving 367 citations. Previous affiliations of Reza Kia include University of Bath.

4,4'-[2,2-Dimethyl-propane-1,3-diyl-bis(nitrilo-methyl-idyne)]dibenzonitrile.

Abstract: The title compound, C21H20N4, is a bidentate Schiff base ligand. An intra­molecular C—H⋯N hydrogen bond forms a five-membered ring, producing an S(5) ring motif. The cyano and imino [–C(H2)—N=C–] functional groups are coplanar with the benzene ring in each half of the mol­ecule. The packing of the mol­ecules is controlled by C—H⋯π and π–π inter­actions [centroid-to-centroid distance = 3.6944 (8) A].

{6,6′-Dieth­oxy-2,2′-[2,2-dimethyl­propane-1,3-diylbis(nitrilo­methyl­idyne)]diphenolato}nickel(II) monohydrate

Abstract: In the title complex, [Ni(C23H28N2O4)]·H2O, the NiII ion is coordinated by the N2O2 unit of the tetra­dentate Schiff base ligand in a slightly distorted planar geometry. The asymmetric unit of the title compound comprises one complex mol­ecule and a water mol­ecule of crystallization. The H atoms of the water mol­ecule make bifurcated inter­molecular hydrogen bonds with the O atoms of the phenolate and eth­oxy groups with R12(5) and R12(6) ring motifs, which may, in part, influence the mol­ecular configuration. The dihedral angle between the two benzene rings is 31.43 (5)°. The crystal structure is further stabilized by inter­molecular C—H⋯O and C—H⋯π inter­actions, which link neighbouring mol­ecules into one-dimensional extended chains along the a axis. An inter­esting feature of the crystal structure is the short inter­molecular C⋯C [3.3044 (14) A] contact which is shorter than the sum of the van der Waals radii.

4,4'-[Propane-1,3-diylbis(nitrilo-methyl-idyne)]dibenzonitrile.

Abstract: The mol­ecule of the title Schiff base compound, C19H16N4, has crystallographic twofold rotation symmetry. The imino group is coplanar with the aromatic ring. Within the mol­ecule, the planar units are parallel, but extend in opposite directions from the central methyl­ene bridge. The packing of the mol­ecules is controlled by C—H⋯π inter­actions.

{6,6′-Dimeth­oxy-2,2′-[2,2-dimethyl­propane-1,3-diylbis(nitrilo­methyl­idyne)]diphenolato}nickel(II) 1.78-hydrate

Abstract: In the title complex, [Ni(C21H24N2O4)]·1.78H2O, the NiII ion has a slightly distorted planar geometry, coordinated by the two N and two O atoms of the tetra­dentate Schiff base ligand, with a mean deviation of 0.272 A from the NiN2O2 plane. The N and O donor atoms are mutually cis. The dihedral angle between two benzene rings of the ligand is 38.86 (8)°. There are also three solvent water mol­ecules, two of which lie across different crystallographic twofold rotation axes; one of these is partially occupied with a refined occupancy factor of 0.570 (7). The water mol­ecules are linked together as tetra­mers in R22(8) ring motifs, which also connect two neighbouring mol­ecules of the complex through a network of O—H⋯O hydrogen bonds. The crystal structure is further stabilized by inter­molecular C—H⋯O and C—H⋯π inter­actions, which link neighbouring mol­ecules into extended chains along the b axis. Other inter­esting features of the crystal structure are the short inter­molecular C⋯C [3.204 (3)–3.365 (3) A] and the C⋯O [3.199 (2)–3.205 (2) A] contacts which are shorter than the sum of the van der Waals radii of these atoms.