About the lecture:
This topic is taken from the Organic chemistry. The Jahn Taylor Distortion is studied with respect to the transition elements or the D block elements. They are called transition elements because they transit the properties form the S block electropositive elements to the group 17 of P block which contains electronegative elements. The Jahn Teller Distortion is an important phenomenon which is shown by the transition elements .It is the distortion in the overall geometry or shape of the transition metal complexes which occurs because of the presence of electrons in the symmetrical orbitals. The distortion in geometry or shape is generally of the octahedral complexes. The Jahn teller distortion is basically of two types, the Z out Jahn teller Distortion and the Z in Jahn teller Distortion. The Z out Jahn teller distortion leads to the elongation in the bonding of the molecule and the Z in Jahn teller Distortion leads to the compression of the molecule. The change in the geometry of the elements is generally from Octahedral to tetragonal in case of Z out type of distortion. The phenomenon is very common in six-coordinate copper(II) complexes. Such complexes distort along one of the molecular fourfold axes (always labelled the z axis), which has the effect of removing the orbital and electronic degeneracies and lowering the overall energy. The distortion normally takes the form of elongating the bonds to the ligands lying along the z axis, but occasionally occurs as a shortening of these bonds instead (the Jahn–Teller theorem does not predict the direction of the distortion, only the presence of an unstable geometry). When such an elongation occurs, the effect is to lower the electrostatic repulsion between the electron-pair on the Lewis basic ligand and any electrons in orbitals with a z component, thus lowering the energy of the complex. The inversion center is preserved after the distortion.
Author:
Dr. Pratik Kumar Jagtap
Assistant Professor – Department of Chemistry – Faculty of Science,
Kalinga University, Raipur – CG
Degrees: Ph.D. in Chemistry, M.Sc. Chemistry
Areas of specialization: Pharmacokinetic Studies of Drugs, Environmental Nano-science and Drugs Analysis.
Dr. Pratik Kumar Jagtap is an Assistant Professor in the school of Applied Sciences Department of Chemistry at Kalinga University, New Raipur, Chhattisgarh. He is M. Sc. and Ph.D. in Chemistry. He has over 7 years of versatile experience in teaching students of Post-Graduate and Under Graduate programs from both Engineering and Science backgrounds.
He is a Life Member of Professional Society of “The Indian Science Congress Association”. He is the Member of Review Committee of 2 Peer-reviewed International Journals of Chemistry.
He has several awards to his credit in international platforms, among them the prestigious ones are : International Young Scientist Award, 1st Prize for Best Oral Presentation and Best Poster Presentation Awards.
Dr. Jagtap has attended several Workshops and Short Term Training Programs in the field of Chemistry and Environmental Science in institutes of national importance such as Bhabha Atomic Research Centre (BARC, Mumbai) and NITs.
He has published 9 Papers in International and National SCI and Scopus Indexed Journals. His areas of research basically deals in advanced green techniques for micro-extraction of drugs from biological samples and their subsequent analysis using sophisticated analytical techniques. He has also participated in many International and National Conferences as a Speaker.
