ChemInform Abstract: SYNTH. UND UNTERSUCHUNGEN 2,4,5‐TRISUBSTITUIERTER 1,3‐DIOXOLANE

Farines, M.; Soulier, J.; Soulier, Renee

doi:10.1002/chin.197228308

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Nuclear Overhauser Effect1

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2013

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“…Four configurational isomers can be drawn assuming a planar conformation of the 1,3-dioxolane ring (Figure 11). 42,43,44 The 4R,5Rand the 4S,5S-isomers have optical activity. The others represent meso forms with (R,S) and (S,R) configurations at the carbon atoms 4 and 5, and pseudo-chirality at position 2.…”

Section: Nuclear Overhauser Effectmentioning

confidence: 99%

Multidimensional NMR characterization of perfluorinated monomer and its precursors

Zhang¹,

Li²,

Mikeš³

et al. 2013

Journal of Fluorine Chemistry

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Perfluorinated polymers are extensively studied due to their low absorption in the near-infrared region of spectrum compared to traditional materials. This makes them ideally suited for plastic optical fiber materials (POF). Different types of perfluorinated polymers, such as poly-(perfluoro-2-methylene-4-methyl-1,3-dioxolane) (poly(PFMMD)) and poly-(vinyl-perfluoro-2,4,5-trimethyl-1,3-dioxolane) (poly(VPFMMD)), can serve as alternatives for poly-(1,1,2,4,4,5,5,6,7,7-decafluoro-3-oxa-1,6-heptadiene) (Crytop ©), which is a commonly used fluoropolymer for POF. In order to get a better understanding of the properties of these polymers, it is important to first characterize the structures and purities of their monomer precursors.

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Section: Nuclear Overhauser Effectmentioning

confidence: 99%

Multidimensional NMR characterization of perfluorinated monomer and its precursors

Zhang¹,

Li²,

Mikeš³

et al. 2013

Journal of Fluorine Chemistry

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show abstract

ChemInform Abstract: SYNTH. UND UNTERSUCHUNGEN 2,4,5‐TRISUBSTITUIERTER 1,3‐DIOXOLANE

Abstract: Die p‐Toluolsulfonsäure‐katalysierte Umsetzung von meso‐ bzw. threo‐Äthylenglykol (Ia) und von (RR)(‐)‐ bzw. meso‐Dimethyltartrat (Ib) mit den Aldehyden (II) zu den Dioxolanen (III) (oft als Stereoisomerengemische) wird beschrieben.

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Multidimensional NMR characterization of perfluorinated monomer and its precursors

Multidimensional NMR characterization of perfluorinated monomer and its precursors

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