Related Experiment Video
Updated: Jun 1, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
Bis(2-acetylpyridine-κN,O)silver(I) tetra-fluoridoborate: a complex with silver in a seesaw coordination geometry
Michael A O'Donnell1, Peter J Steel
1Chemistry Department, University of Canterbury, PO Box 4800, Christchurch, New Zealand.
Abstract:
The reaction of 2-acetylpyridine with silver(I) tetra-fluorido-borate leads to the discrete title complex, [Ag(C(7)H(7)NO)(2)]BF(4), in the cation of which the Ag atom is coordinated by two 2-acetylpyridine ligands, each of which is N,O-bidentate, albeit with stronger bonding to the N atoms [Ag-N = 2.2018 (15) and 2.2088 (14) Å; Ag-O = 2.5380 (13) and 2.5454 (13) Å]. The four-coordinate Ag atom has a seesaw coordination geometry with a τ(4) index of 0.51. The tetra-fluoridoborate anion is disordered over two orientations with 0.568 (10):0.432 (10) occupancies.
More Related Videos
09:46Qualitative Identification of Carboxylic Acids, Boronic Acids, and Amines Using Cruciform Fluorophores
Published on: August 19, 2013
07:20Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
Published on: May 28, 2014
Related Concept Videos
Coordination Number and Geometry
Valence Bond Theory
Formation of Complex Ions
Coordination Compounds and Nomenclature
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,...
Hybridization of Atomic Orbitals I