Transcription of Unit - 9 - NCERT
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Unit - 9 - NCERT
In the previous Unit we learnt that the transition metalsform a large number of complex compounds in whichthe metal atoms are bound to a number of anions orneutral molecules. In modern terminology suchcompounds are called coordination compounds. Thechemistry of coordination compounds is an importantand challenging area of modern inorganic concepts of chemical bonding and molecularstructure have provided insights into the functioning ofvital components of biological systems. Chlorophyll,haemoglobin and vitamin B12 are coordinationcompounds of magnesium, iron and cobalt of metallurgical processes, industrial catalystsand analytical reagents involve the use of coordinationcompounds.
Chemistry 240 (a) Coordination entity A coordination entity constitutes a central metal atom or ion bonded to a fixed number of ions or molecules. For example, [CoCl3(NH3)3] is a coordination entity in which the cobalt ion is surrounded by
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