Facile syntheses of new incompletely condensed polyhedral oligosilsesquioxanes: [(c-C5H9)7Si7O9(OH)3], [(c-C7H13)7Si7O9(OH)3], and [(c-C7H13)6Si6O7(OH)4]

Feher, Frank J.; Budzichowski, Theodore A.; Blanski, Rusty L.; Weller, Keith J.; Ziller, Joseph W.

doi:10.1021/om00053a070

Cited by 216 publications

(130 citation statements)

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“…Cyclopentyltrisilanol (c C 5 H 9 ) 7 -Si 7 O 9 (OH) 3 was obtained by literature methods [39,40]. 4-methoxyphenyl hcp-POSS and 2,4-difluorophenyl hcp-POSS were prepared by corner capping reaction of cyclopentyltrisilanol with the suitable aryltrichlorosilane in dry THF, according to our previous work [30].…”

Section: Synthesis Of Posssmentioning

confidence: 99%

Phenyl hepta cyclopentyl – polyhedral oligomeric silsesquioxane (ph,hcp-POSS)/Polystyrene (PS) nanocomposites: the influence of substituents in the phenyl group on the thermal stability

Blanco

Abate²,

Antonelli³

et al. 2012

Express Polym. Lett.

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Section: Synthesis Of Posssmentioning

confidence: 99%

Phenyl hepta cyclopentyl – polyhedral oligomeric silsesquioxane (ph,hcp-POSS)/Polystyrene (PS) nanocomposites: the influence of substituents in the phenyl group on the thermal stability

Blanco

Abate²,

Antonelli³

et al. 2012

Express Polym. Lett.

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“…This compound is readily available by selective monosilylation of the corresponding trisilanol (c-C 5 H 9 ) 7 Si 7 O 9 (OH) 3 . [22] The SiMePh 2 protecting group is used instead of the more commonly used SiMe 3 unit because of crystal engineering reasons, as silsesquioxanes containing this former group have a higher tendency to crystallize. [23] Also compound 3 was fully characterized by 1 H, 13 C and 31 P NMR spectroscopy as well as by elemental analysis.…”

Section: Synthesis Of Ligands 1 ±mentioning

confidence: 99%

“…Also (c-C 5 H 9 ) 7 Si 8 O 13 Tl (A) and (c-C 5 H 9 ) 7 Si 7 O 9 (OH) 2 (OSiMePh 2 ) (B) were prepared according to literature procedures. [21,22] CAUTION: Thallium-containing compounds are poisonous. Handling of such compounds should be done with utmost care, also regarding the waste disposal of thallium-containing compounds.…”

Section: Experimental Section General Remarksmentioning

confidence: 99%

Versatile Phosphite Ligands Based on Silsesquioxane Backbones

et al. 2004

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Silsesquioxanes are employed as ligand backbones for the synthesis of novel phosphite compounds with 3,3'-5,5'-tetrakis(tert-butyl)-2,2'-dioxa-1,1'-biphenyl substituents. Both mono-and bidentate phosphites are prepared in good yields. Two types of silsesquioxanes are employed as starting materials. The monophosphinite 1 and the monophosphite 2 are prepared from the thallium silsesquioxide derived from a completely condensed silsesquioxane framework (c-C 5 H 9 ) 7 Si 7 O 12 SiOTl. The diphosphite 3 is synthesized starting with the incompletely condensed monosilylated disilanol (c-C 5 H 9 ) 7 Si 7 O 9 (OSiMePh 2 )(OH) 2 . For monophosphite 2, the corresponding trans-[PtCl 2 (2)] complex 4 is characterized by NMR spectroscopy as well as by Xray crystallography, as the first example of a completely condensed oxo-functionalized silsesquioxane framework. The coordination of the bidentate ligand 3 towards Pd, Mo and Rh is studied, both by NMR spectroscopy as well as by X-ray crystallography.

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“…PMAO (7% solution in toluene) was supplied form Akzo Nobel. H 3 c-C5H9 T 7 [17], H 2 (TMS) c-C5H9 T 7 [18], HOSi c-C5H9 T 7 [19] After drying of the residue overnight under high vacuum, it was extracted with 10 mL of hexane. All volatiles were removed from the extract, and the crude material was dried again overnight under high vacuum.…”

Section: Methodsmentioning

confidence: 99%

Progress in the Compilation of an Oxovanada‐Silsesquioxane Portfolio and Catalytic Activity of Organometallic Representatives in Ethylene Polymerisation

Ohde

Limberg

Schmidt

et al. 2010

Zeitschrift anorg allge chemie

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Employing various incompletely condensed silsesquioxanes as ligand precursors in reactions with simple oxovanadates a variety of oxovanadium silsequioxanes could be synthesized, that might be regarded as models for oxovanadium units on silica surfaces. These include a tetranuclear vanadium(IV) compound as well as two complexes where O 2 V + units are coordinated to two siloxide functions as part of a silsesquioxane framework. Moreover, compounds containing Cp*V(O) 2+ moieties were prepared, whose activities as polymerization procatalysts has been examined: They turned out to be moderately active for the polymerization of ethylene. All compounds were fully characterised, in case of the tetranuclear vanadium(IV) complex this also includes the investigation of magnetic behaviour. Moreover, for two complexes also the molecular structures could be determined with sufficient quality via XRD.

show abstract

Facile syntheses of new incompletely condensed polyhedral oligosilsesquioxanes: [(c-C5H9)7Si7O9(OH)3], [(c-C7H13)7Si7O9(OH)3], and [(c-C7H13)6Si6O7(OH)4]

Cited by 216 publications

References 0 publications

Phenyl hepta cyclopentyl – polyhedral oligomeric silsesquioxane (ph,hcp-POSS)/Polystyrene (PS) nanocomposites: the influence of substituents in the phenyl group on the thermal stability

Phenyl hepta cyclopentyl – polyhedral oligomeric silsesquioxane (ph,hcp-POSS)/Polystyrene (PS) nanocomposites: the influence of substituents in the phenyl group on the thermal stability

Versatile Phosphite Ligands Based on Silsesquioxane Backbones

Progress in the Compilation of an Oxovanada‐Silsesquioxane Portfolio and Catalytic Activity of Organometallic Representatives in Ethylene Polymerisation

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