Related Experiment Video
Updated: Mar 25, 2026
Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase
Published on: March 19, 2020
Crystal structure of bis-(1,3-di-amino-propane-κ(2) N,N')bis-[2-(4-nitro-phen-yl)acetato-κO]zinc(II)
T J Roberts1, T F Mehari1, Z Assefa1
11601 E Market St., Department of Chemistry, North Carolina, A & T State University, Greensboro, NC 27411, USA.
Abstract:
In the structure of the title compound, [Zn(C8H6NO4)2(C3H10N2)2], the Zn(II) atom is located on a center of symmetry with one independent Zn-O distance of 2.199 (2) Å, and two Zn-N distances of 2.157 (2) and 2.144 (2) Å. The overall coordination geometry around the Zn(II) atom is octa-hedral. Several types of hydrogen-bonding inter-actions are evident. Both intra-molecular [2.959 (3) Å] and inter-molecular [3.118 (3) and 3.124 (3) Å inter-actions occur between the O atoms of the acetate group and the amino N atoms, and weak inter-molecular C-H-O inter-actions involving the nitro groups, leading to an extended chain of the molecules aligned along the ac plane.
Related Concept Videos
02:42Ionic Crystal Structures
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
02:57Coordination Number and Geometry
01:28Structures of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the unhybridized p...
02:42Valence Bond Theory
02:34Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...