ultra-violet and visible spectro
introduction
The alternate title for technique is electronic Spectroscopy since it involves the promotion of electrons from the ground state to the higher energy state .it is energy very useful to measure the number of conjugated double bonds and also aromatic conjugated systems; within the various molecules. It also distinguishes between congugated and non -conjugated system
alfa ,bita unsaturated carbonyl compound from alfa bita analogues; homoannuler and heteroannuler conjugated dience etc For visible and ultra- voilet spectrum electtronic excitaions occur in the range 200-800 m micro and involves the promotion of eletrons to the higher energy moleculer orbital.
Since the `energy levels of a molecule are quantised, the energy required to bring about the excitation is a fixed quantity. Thus the electromagnetic radiation with only a particular value of frequency will be able to cause excitation. Clearly,if the substance is exposed to rdition of some diffrent value of frequency energy will not be absorbed and thus, light or radiation will not suffer diffrent value of freuancy
अल्फा, बीटा असंतृप्त कार्बोनिल यौगिक से अल्फा बीटा एनालॉग्स; होमोन्नर और विषमलैंगिक
संयुग्मित गोता आदि दृश्य और अल्ट्रा-वॉयलेट स्पेक्ट्रम इलेक्ट्रिटोनिक उत्तेजनाओं के लिए 200-800 मीटर की सीमा में होते हैं और इसमें उच्च ऊर्जा अणु कक्षीय के लिए एलेट्रोन का संवर्धन शामिल होता है।
RAMESH KUMAR
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