Related Experiment Video
Updated: Aug 7, 2025

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
Synthesis, crystal structure and Hirshfeld surface analysis of bis-[4-(2-amino-eth-yl)morpholine-κ2
Balasubramanian Chidambaranathan1, Settu Sivaraj1, Pandy Vijayamathubalan1
1PG and Research Department of Physics, Government Arts College for Men, (Autonomous), Chennai 600 035, Tamil Nadu, India.
Abstract:
The title coordination compound, [Ni(C6H14N2O)2(H2O)2]Cl2, was synthesized by mixing 4-(2-amino-eth-yl)morpholine and nickel chloride in double-distilled water. The asymmetric unit comprises one half of an NiII cation (located on an inversion centre), one 4-(2-amino-eth-yl)morpholine ligand, one coordinated water mol-ecule and one chloride ion outside the metal coordination sphere. The nickel ion is in a octa-hedral environment of the N4O2 type, coordinating four N atoms from two 4-(2-amino-eth-yl)morpholine ligands and two trans-located O atoms from two water mol-ecules. The morpholine ligand was found disordered over two positions with a site occupancy ratio of 0.708 (8):0.292 (8). The crystal structure is consolidated by N-H⋯Cl, N-H⋯O, C-H⋯Cl and C-H⋯O hydrogen bonds. Hirshfeld surface analysis confirms that van der Waals inter-actions are prevalent in the crystal packing of the synthesized complex.
Related Concept Videos
Crystal 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,...
Structural 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...
Ionic 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...
Valence Bond Theory
Structure of Amines
Coordination Number and Geometry

