Related Experiment Video
Updated: Jun 8, 2025

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions
Published on: June 16, 2014
Clues from an ionic cocrystal structure: from catalysis to mechanochemistry
Bandana Sar1, Mollah Rohan Ahsan1, Arijit Mukherjee1
1Department of Chemistry Birla Institute of Science and Technology (BITS) Pilani Hyderabad campus Hyderabad 500078 Telangana India arijit.mukherjee@hyderabad.bits-pilani.ac.in.
Abstract:
A crystal structure is no longer conceived as a static entity; rather, it often mirrors crystallization pathways, linking crystal structures with a solution scenario. In this study, taking a clue from a previously reported ionic cocrystal structure, an in situ acetic acid-based catalytic protocol is developed for the N-acylation of amines using ester sources. In addition to better catalytic efficiency, this in situ approach was extended further to a mechanochemistry protocol in the context of a multicomponent reaction. This points towards a broader applicability of crystal structures that goes beyond the domain of structural chemistry and delves into catalysis and mechanosynthesis.
More Related Videos
Related Concept Videos
Introduction to Mechanisms of Enzyme Catalysis
Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
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...
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Formation of Complex Ions
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,...

