Selenium-77 high resolution solid state NMR studies of organoselenium compounds

• Autorzy: Potrzebowski M. J.
• Języki publikacji: EN

Abstrakty

EN

The review describes the high resolution solid state NMR studies of organoselnium compounds carried out in NMR Laboratory of the Polish Academy of Sciences, Łódź. The review is organized into sections. The X-ray crystallography and 775e solid tate NMR spectroscopy as complementary tools for studies of polymorphs and moleclar packing effect as well as some aspects regarding the ambiguities related to proper hoice of the space group are discussed in Section 2. Section 3 shows recent progress in studies of phosphoroorganic diselenides and relationship between the molecular structure and 775e effective dipolar/chemical shift parameters Tii. It is shown that anisotropy and asymmetry parameters reflect the changes of local environment of selenium centers. The relationship between ,fl and Se-Se bond strength is discussed. Moreover, the studies show the great sensitivity of T(33) parameter to changes of geometry for S=P-Se-Se-P=S unit.; is speculated that T(33) is aligned in plane of P-Se bond. The significant differences in values of isotropic chemical shifts E;so are mostly caused by T(33) component.

Słowa kluczowe

EN

NMR spectroscopy; selenium; solid state

• Wydawca: Centrum Upowszechniania Nauki PAN
• Czasopismo: Bulletin of the Polish Academy of Sciences. Chemistry
• Rocznik: 1998
• Tom: Vol. 46, No. 1
• Strony: 61--74
• Opis fizyczny: Bibliogr. 35 poz.

Twórcy

autor

Potrzebowski M. J.

• Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź (Centrum Badań Molekularnych i Makromolekularnych PAN),