The 2-imino-1,3-selenazolidine group bonded to phosphorus and silicon: a multinuclear magnetic resonance study
✍ Scribed by Ekaterina V. Bakhmutova; Alejandro Cruz; Raúl Ramirez-Trejo; Rosalinda Contreras; Bernd Wrackmeyer
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 168 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0749-1581
- DOI
- 10.1002/mrc.948
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✦ Synopsis
Abstract
A tris(imino)phosphane (3), its sulfide [3(S)], an iminodiphenylphosphane (4), and an iminotrimethylsilane (5), in all of which the imino group belongs to a pseudo‐ephedrine‐derived 2‐imino‐1,3‐selenazolidine ring, were prepared and studied by multinuclear magnetic resonance (^1^H, ^13^C, ^15^N, ^29^Si, ^31^P, ^77^Se NMR). By application of various 1D and 2D NMR techniques, NMR parameters such as the isotope induced chemical shifts ^1^Δ^14/15^N(^31^P) for 4, ^1^Δ^14/15^N(^29^Si) for 5, numerous coupling constants and chemical shifts could be obtained. The absolute sign of ^1^J(^29^Si,^15^N) (>0) was determined for 5. The largest values so far for ^3^J(^77^Se,^31^P) (198.0 Hz in 3 and 194.0 Hz in 4) were observed, and the absolute sign of these coupling constants ^3^J(^77^Se,^31^P) > 0 was determined, together with the signs of various other coupling constants involving ^77^Se or ^31^P. Copyright © 2001 John Wiley & Sons, Ltd.