SOLUTION ION-PAIR STRUCTURE OF 2-LITHIO-1,3-DITHIANES IN THF AND THF-HMPA

Authors
REICH HJ BORST JP DYKSTRA RR
Citation
Hj. Reich et al., SOLUTION ION-PAIR STRUCTURE OF 2-LITHIO-1,3-DITHIANES IN THF AND THF-HMPA, Tetrahedron, 50(20), 1994, pp. 5869-5880
Citations number
59
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron → ACNP
ISSN journal
00404020
Volume
50
Issue
20
Year of publication
1994
Pages
5869 - 5880
Database
ISI
SICI code
0040-4020(1994)50:20<5869:SISO2I>2.0.ZU;2-K
Abstract
An NMR study of 2-lithio-1,3-dithiane and 2-triorganosilyl-, 2-tert-bu tyl- and 2-phenyl-2-lithiodithianes reveals that all are contact ion p air species in THF and all become separated ions with excess HMPA. The dithianes differ greatly in their ease of ion separation, with the pa rent lithiodithiane the most difficult.