central limit theory

The metal ligand bond arises by donation of pair of electrons by ligands to the central metal ato..

Crystal Field Theory - Bonding in a complex ion is due to electrostatic interactions between the positively charged nucleus of the central metal ion and electrons in the ligands i.e., attractive as well as repulsive interactions. (i) The attractive forces will arrive due to the ..

Main Postulates - I) The metal ligand bond arises by donation of pair of electrons by ligands to the central metal atom. II) To accommodate these electrons the metal ion must possess requisite number of vacant orbitals of equal energy. These orbitals of the metal atom undergo hybridisatio..

To use this theory for predicting the shapes of molecules, the number of electron pairs (both, shared and lone pairs) is simply counted. This is illustrated by taking a typical molecule of the type AB n . 'A' is the central atom, 'B' atoms are bonded to 'A' by single covalent b..

Example: In the complex between CoCl 3 and NH 3 the ionizable chloride ions are found by precipitation with AgNO 3 . The remaining Cl and NH 3 are present around the central Co in such directions so as to minimize repulsion and are linked by secondary valencies. a) Primary valencies - rep..

According to the VSEPR theory, the electron pairs present is the valence-shell of the central atom/ion arrange themselves in the space around it so as to keep them as far as possible from each other, so as to minimize the electrostatic repulsion..

Plants and animals show a range of tolerance to environmental factors. The factor, which is present in least amount may become limiting. For example water availability limits plant growth in deserts. But, not only too little of something is a limiting factor, even too..

Geological Distribution - The organisms show particular patterns of distribution on earth. The distribution of the species give an indication of how the earth was earlier. It is believed that the earth was a single mass called the Pangea. It consisted of two large continental masses called Laurasia..

Probability problems with finite sample spaces Conditional probability Discrete/continuous random variables Mean, variance of discrete random variable Standard distributions Mean, standard deviation of normally distributed random variable Central limit theorem Line of b..

fig 10.1 - Orientation of five d orbitals in octahedral environment In the case of a free ion, all the five d-orbitals have the same energy, i.e., they are degenerate (meaning energetically alike). When the ligand approaches the central metal ion, the electrons in d-orbital of the ce..