Synthesis and structure of new eight-membered Si–O–λ5σ4–P heterocycles
Synthesis and structure of new eight-membered Si–O–λ5σ4–P heterocycles
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新型八元Si–O–λ5σ4–P杂环的合成与结构
DOI:
10.1039/a803283a
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发表时间:
1998
期刊:
影响因子:
--
通讯作者:
H. Grützmacher
中科院分区:
文献类型:
--
作者:
Y. Vaugeois;R. Jaeger;Joëlle Levalois;A. Mazzah;M. Wörle;H. Grützmacher
The reaction of Bu2tSi(OLi)21 with PhPOCl2 or of Ph2Si(OLi)2 with POCl3 in a 1:1 molar ratio leads to the formation of the 1,3,3,7-tetraoxa-2,6-disila-4,8-λ5σ4-diphosphacyclooctanes 5 and 9, respectively. An X-ray structure analysis shows 5 to contain an eight-membered Si2O4P2 ring in the chair conformation. The Si–O (1.65 A) and P–O 1.57 A bond lengths in the ring lie within the typical range; the terminal PO oxygen centres are in an axial position and oriented trans with respect to the central Si2O4 plane.