Citation
I. Abrahams et al., Structurally different divalent metallasiloxanes [Mg{O(Ph2SiO)(2) }(2)]-mu-(LiPy)-mu-{(LiPy)(3)(OH)(Cl)}], [Cr{O(Ph2SiO)(2)}(2)-mu-(LiPy2)(2)] and [{O(Ph2SiO)(2)}Co{O(Ph2SiO)(3)}-mu-(LiPy2)(2)] from Ph2Si(OH)(2)/2BuLi and the metal dichlorides, KHIM GETERO, (8), 1999, pp. 1085-1097
Citations number
26
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
KHIMIYA GETEROTSIKLICHESKIKH SOEDINENII
ISSN journal
01326244
→ ACNP
Issue
8
Year of publication
1999
Pages
1085 - 1097
Database
ISI
SICI code
0132-6244(199908):8<1085:SDDM[}>2.0.ZU;2-O
Abstract
Three structurally different metallasiloxanes were formed from reactions be
tween in situ generated suspensions of Ph2Si(OH)(2)/BuLi (1:2) in tetrahydr
ofuran (THF) with, metal dichlorides MgCl2.2THF, CrCl2, or CoCl2 followed b
y toluene/Py (Py = pyridine) work-up. The X-ray structures are reported for
: [Mg{O(Ph2SiO)(2)}(2)]-mu-(LiPy)-mu-{(LiPy)(3)(OH)(Cl)] (1) incorporating
two six-membered magnesiasiloxane rings and an MgLi3O3Cl cubane fragment, [
{O(Ph2SiO)(2)}Co{O(Ph2SiO)(3)}-mu-(LiPy2)(2)] (2) with both six- and eight-
membered cobaltasiloxane rings and [Cr{O(Ph2SiO)(2)}(2)-mu-(LiPy2)(2)] (3)
With two six-membered chromiasiloxane rings. Structure assembly in these ca
ses is apparently dictated by the metal dichloride. The compound [{O(Ph2SiO
)(2)}Mg{O(Ph2SiO)(3)}-mu-(CoClPy)(2)].Py (4) is formed from [{O(Ph2SiO)(2)}
Mg{O(Ph2SiO)(3)}-mu-(LiPy2)(2)] and CoCl2 (1:2).