Ab initio optimizations at the HF/6-31G level and single-point calculations at the MP2/6-31G\*\*//6-31G level were performed on ethane-1,1-diol and ethane-1,1,2-triol. Their conformational properties are discussed in terms of the anomeric effect, gauche effect and internal O-H interactions. The resu
NMR Investigation on the Solution Structure and Dynamic Behaviour of 1,2-Diphenyl-1,2-bis(trimethylsilyl)ethanediyldilithium
✍ Scribed by Alois Fürstner; Günter Seidel; Hans-Egbert Mons; Richard Mynott
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 143 KB
- Volume
- 1998
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
Diphenyl-1,2-bis(trimethylsilyl)ethene (5) undergoes a determined by NMR spectroscopy ( 1 H, 13 C, 6 Li, 7 Li NMR and 6 Li, 1 H-HOESY). It is shown that the phenyl rings have a high smooth reductive metallation with metallic lithium to yield the corresponding dilithioethane derivative (Li 2 •5). The quinoid character and that the lithium cations are relatively mobile. structure of this new compound in [D 8 ]THF solution was
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The crystal structure of 25,27-dihydroxy-26,28-bis(diethoxyphosphoryloxy)-tert-butylcalix[4]arene (1) (hexane solvate, 1:1) was determined by x-ray crystallography. The crystal data are P2 1 /n, a = 12.652(1) A ˚, b = 12.564(2) A ˚, c = 18.781(4) A ˚, b = 105.56(1)°, V = 2876.0(8) A ˚3, Z = 2. In th