Theoretical investigation on conformational preferences and structural properties of 2-lithio-1,3-diphosphinane and 2-lithio-1,3-dimethyl-1,3-diphosphinane
✍ Scribed by Nafiseh Jalalimanesh, Fatemeh Saberi Roongiani, Farnaz Jafarpour…
- Book ID
- 120779517
- Publisher
- Springer
- Year
- 2012
- Tongue
- English
- Weight
- 332 KB
- Volume
- 24
- Category
- Article
- ISSN
- 1040-0400
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## Abstract Crystal structure investigations reveal that η^3^‐lithio‐1,3,3‐triphenylpropyne‐(diethyl ether)~2~ [6 · (OEt~2~)~2~] is of the propargyl structural type while [1‐lithio‐1‐(2‐methoxyphenyl)‐3,3‐diphenylallene‐(diethyl ether)]~2~ {[7 · OEt~2~]~2~} is of the allenyl type. The assignment of
the line-shape changes allow the detection of two different dynamic processes, which may be assigned to inhibited rotations about the partial C C and C N double bonds of the E-isomers (Scheme 2). Above ca. 0°C conversion into the isomer with Z-configurated CC double bond, which contains an intramol