Introduction of per(fluoroorganosilyl) peripheries into carbosilane dendrimers and related core-functionalized monodendrons gives rise to anomalous hydrodynamic and viscosimetric behavior

Authors
Casado, MA Roovers, J Stobart, SR
Citation
Ma. Casado et al., Introduction of per(fluoroorganosilyl) peripheries into carbosilane dendrimers and related core-functionalized monodendrons gives rise to anomalous hydrodynamic and viscosimetric behavior, CHEM COMMUN, (4), 2001, pp. 313-314
Citations number
38
Categorie Soggetti
Chemistry
Journal title
CHEMICAL COMMUNICATIONS
ISSN journal
13597345 → ACNP
Issue
4
Year of publication
2001
Pages
313 - 314
Database
ISI
SICI code
1359-7345(2001):4<313:IOPPIC>2.0.ZU;2-G
Abstract
Platinum-catalyzed hydrosilylation of allyl-terminated carbosilane monodend rons using the silanes SiHMe2[(CH2)(n)R-f] (1a, n = 2, R-f = n-C6F13; 1b, n = 3, R-f = -C6F5) yields fluorous, liquid analogues to [G-3], BrC6H4(CH2)( 3)SiMe[(CH2)(3)SiMe[(CH2)(3)SiMe[(CH2)(3)SiMe2(CH2)(n)R-f](2)](2)](2) (7a, n = 2, R-f = n-C6F13- ; 7b, n = 3, R-f = -C6F5), intrinsic viscosities [eta ] for which are unusually low, resulting in calculated hydrodynamic radii/A ngstrom (ca. 6.3, [G-1]; 8.3, [G-2]; 11.5, [G-3]) that imply unusually comp act structures.