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Strain (chemistry)
In chemistry, a molecule experiences strain when its chemical structure undergoes some stress which raises its internal energy in comparison to a strain-free reference compound. The internal energy of a molecule consists of all the energy stored within it. A strained molecule has an additional amount of internal energy which an unstrained molecule does not. This extra internal energy, or strain energy, can be likened to a compressed spring.〔Anslyn and Dougherty, ''Modern Physical Organic Chemistry'', University Science Books, 2006, ISBN 978-1-891389-31-3〕 Much like a compressed spring must be held in place to prevent release of its potential energy, a molecule can be held in an energetically unfavorable conformation by the bonds within that molecule. Without the bonds holding the conformation in place, the strain energy would be released.
==Summary==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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