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Preparation of [1‐ 13 C], [3‐ 13 C], [1‐D] and [3‐D] Enriched Cyclobutenes
Author(s) -
Bak Børge,
Led Jens Jørgen
Publication year - 1968
Publication title -
journal of labelled compounds
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.432
H-Index - 47
eISSN - 1099-1344
pISSN - 0022-2135
DOI - 10.1002/jlcr.2590040105
Subject(s) - cyclobutene , molecule , high resolution , proton magnetic resonance , microwave , infrared , chemistry , spectral line , analytical chemistry (journal) , nuclear magnetic resonance , ring (chemistry) , physics , organic chemistry , geology , optics , remote sensing , quantum mechanics , astronomy
Three isotopically enriched samples of cyclobutene have been prepared, namely, a mixture containing 20 % [1‐ 13 C]cyclobutene, 20 % [3‐ 13 C]cyclobutene and 60 % parent molecule; a second mixture of 75 % [1‐D]cyclobutene and 25 % parent molecule; and a third mixture of 50 % [3‐D]cyclobutene and 50 % parent molecule. Proton magnetic resonance and infrared spectra showed the samples to be of high purity (> 95 %). The preparations successfully have been used for high‐resolution microwave studies. The observed microwave line intensities also agreed with the percentage compositions given above.