The polyoctahedral silsesquioxane (POSS) 1,3,5,7,9,11,13,15-octaphenylpentacyclo[9.5.1.13,9.15,15.17,13]-octasiloxane (octaphenyl-POSS)

Parameswara Rao Chinnam; Michael R. Gau; Joseph Schwab; Michael J. Zdilla; Stephanie L. Wunder

doi:10.1107/S2053229614019834

The polyoctahedral silsesquioxane (POSS) 1,3,5,7,9,11,13,15-octaphenylpentacyclo[9.5.1.1^3,9.1^5,15.1^7,13]-octasiloxane (octaphenyl-POSS)

Parameswara Rao Chinnam, Michael R. Gau, Joseph Schwab, Michael J. Zdilla, Stephanie L. Wunder

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

Solvent-free single crystals of 1,3,5,7,9,11,13,15-octaphenylpentacyclo[9.5.1.1^3,9.1^5,15.1^7,13]octasiloxane (abbreviated as octaphenyl-POSS), C₄₈H₄₀O₁₂Si₈, were obtained by dehydration/condensation of the tetrol Si₄O₄(Ph)₄(OH)₄. The powder pattern generated from the single-crystal data matches well with the experimentally measured powder pattern of commercial octaphenyl-POSS. The geometry of the centrosymmetric molecule in the crystal was compared with that in the gas phase, and had shorter Si - O bond lengths and a broader range of Si - O - Si bond angles. The average Si - O bond length [1.621 (3) Å], and Si - O - Si and O - Si - O bond angles [149 (5) and 109 (1)°, respectively] were within the same range measured previously for octaphenyl-POSS solvates.

Original language	English
Pages (from-to)	971-974
Number of pages	4
Journal	Acta Crystallographica Section C: Structural Chemistry
Volume	70
DOIs	https://doi.org/10.1107/S2053229614019834
State	Published - Oct 15 2014
Externally published	Yes

Keywords

POSS
crystal structure
nanocomposites
octasiloxane
polyoctahedral silsesquioxanes

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10.1107/S2053229614019834

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@article{2c6c95b2e3af4713868ce585f1e38060,

title = "The polyoctahedral silsesquioxane (POSS) 1,3,5,7,9,11,13,15-octaphenylpentacyclo[9.5.1.13,9.15,15.17,13]-octasiloxane (octaphenyl-POSS)",

abstract = "Solvent-free single crystals of 1,3,5,7,9,11,13,15-octaphenylpentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane (abbreviated as octaphenyl-POSS), C48H40O12Si8, were obtained by dehydration/condensation of the tetrol Si4O4(Ph)4(OH)4. The powder pattern generated from the single-crystal data matches well with the experimentally measured powder pattern of commercial octaphenyl-POSS. The geometry of the centrosymmetric molecule in the crystal was compared with that in the gas phase, and had shorter Si - O bond lengths and a broader range of Si - O - Si bond angles. The average Si - O bond length [1.621 (3) {\AA}], and Si - O - Si and O - Si - O bond angles [149 (5) and 109 (1)°, respectively] were within the same range measured previously for octaphenyl-POSS solvates.",

keywords = "POSS, crystal structure, nanocomposites, octasiloxane, polyoctahedral silsesquioxanes",

author = "Chinnam, {Parameswara Rao} and Gau, {Michael R.} and Joseph Schwab and Zdilla, {Michael J.} and Wunder, {Stephanie L.}",

note = "Publisher Copyright: {\textcopyright} 2014 International Union of Crystallography.",

year = "2014",

month = oct,

day = "15",

doi = "10.1107/S2053229614019834",

language = "English",

volume = "70",

pages = "971--974",

journal = "Acta Crystallographica Section C: Structural Chemistry",

issn = "2053-2296",

publisher = "John Wiley & Sons Inc.",

}

TY - JOUR

T1 - The polyoctahedral silsesquioxane (POSS) 1,3,5,7,9,11,13,15-octaphenylpentacyclo[9.5.1.13,9.15,15.17,13]-octasiloxane (octaphenyl-POSS)

AU - Chinnam, Parameswara Rao

AU - Gau, Michael R.

AU - Schwab, Joseph

AU - Zdilla, Michael J.

AU - Wunder, Stephanie L.

PY - 2014/10/15

Y1 - 2014/10/15

N2 - Solvent-free single crystals of 1,3,5,7,9,11,13,15-octaphenylpentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane (abbreviated as octaphenyl-POSS), C48H40O12Si8, were obtained by dehydration/condensation of the tetrol Si4O4(Ph)4(OH)4. The powder pattern generated from the single-crystal data matches well with the experimentally measured powder pattern of commercial octaphenyl-POSS. The geometry of the centrosymmetric molecule in the crystal was compared with that in the gas phase, and had shorter Si - O bond lengths and a broader range of Si - O - Si bond angles. The average Si - O bond length [1.621 (3) Å], and Si - O - Si and O - Si - O bond angles [149 (5) and 109 (1)°, respectively] were within the same range measured previously for octaphenyl-POSS solvates.

AB - Solvent-free single crystals of 1,3,5,7,9,11,13,15-octaphenylpentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane (abbreviated as octaphenyl-POSS), C48H40O12Si8, were obtained by dehydration/condensation of the tetrol Si4O4(Ph)4(OH)4. The powder pattern generated from the single-crystal data matches well with the experimentally measured powder pattern of commercial octaphenyl-POSS. The geometry of the centrosymmetric molecule in the crystal was compared with that in the gas phase, and had shorter Si - O bond lengths and a broader range of Si - O - Si bond angles. The average Si - O bond length [1.621 (3) Å], and Si - O - Si and O - Si - O bond angles [149 (5) and 109 (1)°, respectively] were within the same range measured previously for octaphenyl-POSS solvates.

KW - POSS

KW - crystal structure

KW - nanocomposites

KW - octasiloxane

KW - polyoctahedral silsesquioxanes

UR - http://www.scopus.com/inward/record.url?scp=84937682562&partnerID=8YFLogxK

U2 - 10.1107/S2053229614019834

DO - 10.1107/S2053229614019834

M3 - Article

AN - SCOPUS:84937682562

SN - 2053-2296

VL - 70

SP - 971

EP - 974

JO - Acta Crystallographica Section C: Structural Chemistry

JF - Acta Crystallographica Section C: Structural Chemistry

ER -

The polyoctahedral silsesquioxane (POSS) 1,3,5,7,9,11,13,15-octaphenylpentacyclo[9.5.1.1^3,9.1^5,15.1^7,13]-octasiloxane (octaphenyl-POSS)

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