EXPERIMENTAL-EVIDENCE FOR ETHYLIDENE-D4

被引：62

作者：

MODARELLI, DA ^{[1
]}

PLATZ, MS ^{[1
]}

机构：

[1] OHIO STATE UNIV,DEPT CHEM,120 W 18TH AVE,COLUMBUS,OH 43210

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 1993年 / 115卷 / 02期

关键词：

D O I：

10.1021/ja00055a016

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Laser flash photolysis (LFP, 351 nm, XeF excimer) of 3-methyldiazirine in the presence and absence of pyridine fails to produce a UV-vis active transient intermediate. However, LFP of 3-methyldiazirine-d4 in pentane containing pyridine produces a transient absorption attributed to the ethylidene-d4-pyridine ylide. A double-reciprocal plot of the optical yield of ylide (A(y)-1) versus (pyridine concentration)-1 is linear and indicates that the lifetime of ethylidene-d4 is 500 ps in pentane, assuming that the second-order rate constant of reaction of ethylidene-d, with pyridine is 1 x 10(9) M-1 s-1. Laser induced fluorescence spectra of methyldiazirine and methyldiazirine-d4 are reported and discussed.

引用

页码：470 / 475

页数：6

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