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sunjing1985铜虫 (小有名气)
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isokinetic relationship的中文意思
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在文献中看到isokinetic relationship，想知道确切翻译，还有它的定义。它在那篇文献里说由于isokinetic relationship的存在，两种温度下反应速率常数的对数呈线性相关，不太懂。请教一下 [ Last edited by nxl5096224 on 2009-1-30 at 21:28 ] |
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sunjing1985
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5楼2008-06-19 19:21:09
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isokinetic relationship When a series of structurally related substrates undergo the same general reaction or when the reaction conditions for a single substrate are changed in a systematic way, the enthalpies and entropies of activation sometimes satisfy the relation: D‡H - bD‡S = constant where the parameter b is independent of temperature. This equation (or some equivalent form) is said to represent an ‘isokinetic relationship’. The temperature T = b (at which all members of a series obeying the isokinetic relationship react at the same rate) is termed the ‘isokinetic temperature’. Supposed isokinetic relationships as established by direct correlation of D‡H with D‡S are often spurious and the calculated value of b is meaningless, because errors in D‡H lead to compensating errors in D‡S. Satisfactory methods of establishing such relationships have been devised. See also compensation effect, isoequilibrium relationship, isoselective relationship. 1994, 66, 1129 IUPAC Compendium of Chemical Terminology 2nd Edition (1997) |
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