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2-Benzopyrylium salts. 42. Ortho-quinoid intermediates in recyclization reactions of 2-benzopyrylium salts

✍ Scribed by S. V. Verin; D. É. Tosunyan; E. V. Kuznetsov

Publisher: Springer US
Year: 1991
Tongue: English
Weight: 526 KB
Volume: 27
Category: Article
ISSN: 0009-3122
DOI: 10.1007/bf00471741

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The weak intensity of the CN stretching band in IR spectra for l-ayanoiso chromenes is obviousZy determined by the steric position of the CN group in the rroZecuZe, as it was estabUshed by X-ray structuraZ anclysis for the ayanide addition product (2d) of l-isopropyZ-3-methyZ-2-benzopyryZium sclts.