A study has been made of C-13 NMR spectra of several series of imidazoles and their salts in solution and in the solid state. It has been shown that in compounds containing a pyridine ring, prototropic tautomerism on the NMR time scale may be retarded. The possible mechanism of these processes is discussed.
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UNIV ROME,CNR,CTR STUDIO CHIM SOSTANZE ORGAN NAT,IST CHIM ORGAN,I-00185 ROME,ITALYUNIV ROME,CNR,CTR STUDIO CHIM SOSTANZE ORGAN NAT,IST CHIM ORGAN,I-00185 ROME,ITALY
BIANCO, A
BONINI, C
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UNIV ROME,CNR,CTR STUDIO CHIM SOSTANZE ORGAN NAT,IST CHIM ORGAN,I-00185 ROME,ITALYUNIV ROME,CNR,CTR STUDIO CHIM SOSTANZE ORGAN NAT,IST CHIM ORGAN,I-00185 ROME,ITALY
BONINI, C
GUISO, M
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UNIV ROME,CNR,CTR STUDIO CHIM SOSTANZE ORGAN NAT,IST CHIM ORGAN,I-00185 ROME,ITALYUNIV ROME,CNR,CTR STUDIO CHIM SOSTANZE ORGAN NAT,IST CHIM ORGAN,I-00185 ROME,ITALY
GUISO, M
IAVARONE, C
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UNIV ROME,CNR,CTR STUDIO CHIM SOSTANZE ORGAN NAT,IST CHIM ORGAN,I-00185 ROME,ITALYUNIV ROME,CNR,CTR STUDIO CHIM SOSTANZE ORGAN NAT,IST CHIM ORGAN,I-00185 ROME,ITALY
IAVARONE, C
TROGOLO, C
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UNIV ROME,CNR,CTR STUDIO CHIM SOSTANZE ORGAN NAT,IST CHIM ORGAN,I-00185 ROME,ITALYUNIV ROME,CNR,CTR STUDIO CHIM SOSTANZE ORGAN NAT,IST CHIM ORGAN,I-00185 ROME,ITALY