Terms used in Coordination compounds Coordination Entity or Complex lon A coordination entity constitutes a central metal atom or ion bonded to a fixed number of oppositely charged ions or neutral molecules. For example : [CoCl3(NH3)3] is a coordination entity, in which the cobalt (+3) ion is surrounded by three ammonia molecules and three negatively charged chloride … [Read more...] about Terms used in Coordination compounds
Class 12
Werner’s Coordination Theory
![structure of [Co(NH3)6]Cl3](https://classnotes.org.in/wp-content/uploads/CoNH36Cl3--150x150.jpg)
Werner's Coordination Theory Alfred Werner a Swiss chemist, in 1892 prepared a large number of coordination compounds and studied their physical, chemical and isomeric behaviour by simple experimental techniques. He isolated cobalt compounds from the reaction of cobalt chloride and ammonia. The earlier studies of cobalt complexes were precipitation reactions, conductance … [Read more...] about Werner’s Coordination Theory
Coordination Compounds
Coordination Compounds Coordination compounds are a special class of compounds in which the central metal atom is surrounded by ions or molecules beyond their normal valency. These are also referred to as complex compounds. These compounds are called Coordination compounds. Many biologically important compounds are coordination compounds in which complicated organic … [Read more...] about Coordination Compounds
Compounds of Xenon and uses of Noble Gases
Compounds of Xenon (a) Xenon fluorides The three common fluorides are XeF2, XeF4, and XeF6 (1) Xenon difluoride, XeF2 It is prepared by heating a mixture of xenon and fluorine in the molecular ratio of 2:1 at 673 K in a sealed nickel vessel at 1 bar pressure. On cooling quickly a colourless solid XeF2 is formed. Xe + F2 → XeF2 ( Ni Vessel, 1 bar) (2:1 … [Read more...] about Compounds of Xenon and uses of Noble Gases
Characteristics and Physical Properties of Group 18 Elements
Group 18 The group 18 consists of elements helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn). These gases at ordinary temperature do not have chemical reactivity and therefore, these were called inert gases. Because of the low abundance of these gases on earth, they have also been called rare gases. Occurrence of Noble Gases Due to the inert … [Read more...] about Characteristics and Physical Properties of Group 18 Elements