Abstract
Herein we report the first synthesis of 1,5- di-(ethylphenyl)-1,5-dimethyl-3,3,7,7-tetraphenylcyclotetrasiloxane using a new ‘One Pot’ procedure as recently reported for the preparation of strictly alternating 1,1,5,5-tetramethyl-3,3,7,7-tetraphenylcyclotetrasiloxane by the heterofunctional condensation of diphenylsilanediol with (phenylethyl)methyldichlorosilane in the presence of the ter tiary amine, triethylamine (Nguyen et al. Silicon 6:21–26 2014). The prepared 1,5-di-(ethylphenyl)-1,5-dimethyl-3,3,7,7-tetraphenylcyclotetrasi loxane was fully characterized by single-crystal X-ray diffraction, 1H, 13C and 29Si nuclear magnetic resonance spectroscopy, elemental analysis, mass spectroscopy, thermogravimetric analysis and differential scanning calori metric studies.
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Abbreviations
- Alt:
-
Alternating
- Co:
-
Copolymerization
- DPS:
-
Diphenylsiloxane
- PDMS:
-
Polydimethylsiloxane
- Poly:
-
Polymer(ic)
- ROP:
-
Ring Opening Polymerization
- T g :
-
Glass Transition Temperature
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Nguyen, KA.T., Clarke, S.R., Matisons, J. et al. Synthesis and Structure of 1,5-Di-(Ethylphenyl)-1,5-Dimethyl-3,3,7,7-Tetraphenylcycloterasiloxane: a Novel Cyclotetramer. Silicon 8, 99–104 (2016). https://doi.org/10.1007/s12633-014-9210-6
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DOI: https://doi.org/10.1007/s12633-014-9210-6