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Addition of Electrophiles to Diethyl 2,4-Bis(diethylamino)cyclobutadiene-1,3-dicarboxylate

✍ Scribed by Prof. Dr. Rudolf Gompper; Dr. Günter Seybold

Publisher
John Wiley and Sons
Year
1971
Tongue
English
Weight
240 KB
Volume
10
Category
Article
ISSN
0044-8249

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ses. Their relative total energies are 0, 0.4, 4.4 and -3.6 kcalmol-I , respectively.1111 Although the difference in energy between the (q2-0,C-HNCO)(q2-C,N-HNCO) and (q2-C,N-HNCO), isomers is small, the calculations are inconsistent with the observed structure. Next, we used molecular mechanics ca