Physical image vs. structure relation, 5 [1]. Multinuclear NMR structural study on some hydrazones of O,O-Dialkyl 1-Oxoalkanephosphonates

• Autorzy: Nazarski R. B. , Gralak D. K. , Kudzin Z. H.
• Języki publikacji: EN

Abstrakty

EN

An unambiguous method for determination of the configuration of any single 0,0-dialkyl 1-oxoalkanephosphonate hydrazones based on H, C, P NMR data has been elaborated; the use of 1 JCp (P-C=N) couplings is the most fruitful. The 12C/13C isotope effects on the P chemical shifts of selected compounds have been measured. For primary hydrazones the E/Z isomerisation with stabilisation of their Z forms through an intramolecular H-bonding has been proven. In addition, for the latter stereoisomers small scalar couplings between H-bonded groups N-H.. .O=P have been found, JHP 2.4-3.4 Hz. The possibility of the across H-bridge transfer of spin-spin interactions in these forms is also discussed.

Słowa kluczowe

EN

hydrazon; stereochemistry; isomerization; NMR spectroscopy

PL

hydrazon; stereochemia; izomeryzacja; rezonans jądrowy magnetyczny

• Wydawca: Centrum Upowszechniania Nauki PAN
• Czasopismo: Bulletin of the Polish Academy of Sciences. Chemistry
• Rocznik: 2000
• Tom: Vol. 48, No. 1
• Strony: 27--33
• Opis fizyczny: Bibliogr. 23 poz.

Twórcy

autor

Nazarski R. B.

autor

Gralak D. K.

autor

Kudzin Z. H.

• Department of Organic Chemistry, University of Łódź, Narutowicza 68, 90-136 Łódź 1, P.O. Box 376, Poland [Katedra Chemii Organicznej, Uniwersytet Łódzki],