Matches in SemOpenAlex for { <https://semopenalex.org/work/W1963535364> ?p ?o ?g. }
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- W1963535364 abstract "Abstract The syntheses and single-crystal X-ray structures of several well-defined hexaphenyltrisiloxanediolates of sodium, titanium, and iron are reported. All these compounds contain eight-membered MSi 3 O 4 rings (M = Na, Ti, Fe). Treatment of 1,1,3,3-tetraphenyldisiloxane-1,3-diol, (HO)SiPh 2 OSiPh 2 (OH) ( 1 ), with excess metallic Na in THF afforded the sodium-hexaphenyltrisiloxandiolate reagent [Ph 2 Si(OSiPh 2 O) 2 ] 2 Na 4 (THF) 4 ( 3a ) in 68% yield. Single crystals suitable for X-ray diffraction were obtained for the diglyme solvate [Ph 2 Si(OSiPh 2 O) 2 ] 2 Na 4 (diglyme) 2 ( 3b ) which was prepared in 76% yield by recrystallization of 3a from diglyme (=ethylene-bis(2-methoxyethyl)ether). Readily accessible 3a has been demonstrated to be a highly useful precursor for new transition metal hexaphenyltrisiloxanediolates (=metallacyclotetrasiloxanes). Reaction of 3a with an excess of TiCl 4 in THF provided the titanacyclotetrasiloxane derivative [Ph 2 Si(OSiPh 2 O) 2 ]TiCl 2 (THF) 2 ( 4 ) with octahedral coordination around titanium. Similar reaction of 3a with FeCl 3 in THF afforded the anionic spirocyclic iron(III) complex [Na(DME) 3 ][{Ph 2 Si(OSiPh 2 O) 2 } 2 Fe] ( 5 ) as yellow-brown crystals in 71% yield. An iron(III) analog of 4 , the anionic ferracyclotetrasiloxane complex [Li(DME) 3 ][Ph 2 Si(OSiPh 2 O) 2 FeCl 2 ] ( 6 ) was prepared in moderate yield (53%) by deprotonation of 1,1,3,3,5,5-hexaphenyl-1,3,5-trisiloxanediol, Ph 2 Si(OSiPh 2 OH) 2 ( 2 ), with n -butyllithium followed by reaction with FeCl 3 in DME. The molecular and crystal structures of 3b , 4 , 5 , and 6 have been determined by X-ray diffraction." @default.
- W1963535364 created "2016-06-24" @default.
- W1963535364 creator A5005752122 @default.
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- W1963535364 creator A5069558116 @default.
- W1963535364 creator A5082029428 @default.
- W1963535364 date "2015-01-01" @default.
- W1963535364 modified "2023-09-25" @default.
- W1963535364 title "Synthesis and structure of hexaphenyltrisiloxanediolates of sodium, titanium, and iron" @default.
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