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The basic INEPT pulse sequence proved most useful for recording  15 N NMR spectra at natural abundance of bis(amino)stannvlenes (1). -plumbylenes (2) and of imino-amino-λ 2 -phosphanes (3), where the nitrogen atoms carry bulky substituents like Me 3 Si-, t-Bu-, 2.4.4-trimethyl-2- pentyl-groups (t-Oct-groups) or are part of the 2.2.6.6-tetramethylpiperidinyl group. The sensitiv­ity of this technique is proved by the observation of  117/119 Sn or  207 Pb satellites owing to spin-spin coupling constants  1 J( 117/119 Sn 15 N) and  1 J( 117/119 Pb 15 N), respectively. NMR data of bis[bis(trimethylsilyl)methyl]tin (4) are reported in order to corroborate the arguments for the interpretation of the δ( 15 N) and  1 J( 119 Sn 15 N) data. The  15 N NMR data of the λ 2 -phosphanes (3) indicate a bonding situation similar to that in triazenes.

zeitschrift für naturforschung b

Anwendung der  15 N-NMR-Spektroskopie zur Charakterisierung reaktiver, koordinativ ungesättigter Zinn-, Bleiund Phosphor-Stickstoff-Verbindungen / Application of  15 N-NMR Spectroscopy to the Characterization of Reactive, Coordinatively Unsaturated Tin-, Lead- and Phosphorus-Nitrogen Compounds