@article{300b551c9e7242adb12d120ef7d8de8e,
title = "An approach to dendritic oligosilanes: Controlling the conformation through ring formation",
abstract = "The synthesis, solid-state structure, and UV spectroscopic properties of the first-generation single-core oligosilane dendrimer MeSi[SiMe 2Si(SiMe3)2Me]2[SiMe 2Si(SiMe3)3] (5) and the tethered analogue (CH2)4[Si(SiMe3)2SiMe 2]2Si[SiMe2Si(SiMe3)3]Me (4) are reported. UV spectroscopic measurements in solution and in the solid state (diffuse reflectance) show the absorption maximum of tetramethylenetethered 4 to be shifted to wavelengths longer than those of 5, the dendrimers MeSi[SiMe2Si(SiMe3)3] 3 (6) and MeSi[SiMe2Si(SiMe3) 2Me]3 (7), and even that of the linear heptasilane Si 7Me16. This can be explained by the results of the X-ray analysis of 4 and 5, which reveal for 4 the presence of an A-D-A-D conformer, which is optimal for σ-conjugation, whereas in 5 only D-D-O-D conformers have been found.",
author = "C. Krempner and H. Reinke",
note = "Funding Information: 4This research, in collaboration with PhD Roberta Di Risio, was presented during the conference Fuzzy Set, Multivaluted Operations and Application to Social Science, Universit{\`a} G. d{\textquoteright}Annunzio Chieti—Pescara, 18 Settembre 2015. 5The learning community detected is part of the project Master “Koin{\`e}. Professione formatore per la didattica della comunicazione” (Koin{\`e}. Profession trainer for teaching communication). The Master was promoted and funded by the Ministry of Education and was activated for the academic years 2013–2014 and 2014/2015 at the “G. d'Annunzio ”, with the Scientific Coordination and Teaching Prof. Giselda Antonelli. It covers four Italian universities: Universit{\`a} “G. d'Annunzio ”of Chieti-Pescara, Universit{\`a} of Genoa, Universit{\`a} of Salerno and Universit{\`a} of Palermo Studies and is connected to the National Plan Logos.",
year = "2007",
month = apr,
day = "9",
doi = "10.1021/om060964k",
language = "English",
volume = "26",
pages = "2053--2057",
journal = "Organometallics",
issn = "0276-7333",
publisher = "American Chemical Society",
number = "8",
}