Ivoclar Vivadent Ag

Evonik Degussa Gmbh

Evonik Operations Gmbh

Technische Universitat Graz

Harald Stüger

Norbert Moszner

Hartwig Rauleder

Michael Haas

Urs Karl Fischer

Iris Lamparth

Guido Stochniol

Stephan Wieber

Yohann Catel

Martin Trocha

Matthias Patz

Dorit Wolf

Nicole Brausch

Odo Wunnicke

Urs-Karl Fischer

Stephan Traut

Jörg Sauer

André Ebbers

Christoph Walkner

Jasmin Lehmkuhl

Georg Gescheidt Demner

Pascal Fässler

Michael Holthausen

Miriam Deborah Malsch

Michael Cölle

Yücel Önal

Bernhard Stützel

Ekkehard Müh

Judith Radebner

Thomas Lainer

Georg Gescheidt-Demner

A method is useful for preparing partially hydrogenated chlorosilanes by selective hydrogenation with a compound of the formula RAlH, wherein R is a branched or cyclic hydrocarbon. Partially hydrogenated chlorosilanes can be prepared with said method, in particular partially hydrogenated chlorosilanes represented by the formula ClSiSi(SiH), (ClSi)Si(SiH)or HSi(SiH)SiCl.

Partially hydrogenated chlorosilanes and methods for preparing same by selective hydrogenation

Compounds according to general formula (I) in which M is Ge or Sn, RAr is R, R, R, R, R, independently of one another in each case, are &#x2014;H, &#x2014;F, &#x2014;Cl, &#x2014;OR, &#x2014;SR, &#x2014;N(R), &#x2014;CF, &#x2014;CN, &#x2014;NO, &#x2014;COOR, &#x2014;CONHR, a branched, cyclic or preferably linear Calkyl, Calkenyl, Calkyloxy or a Calkenoxy radical, which can be interrupted one or more times by O, S or &#x2014;NR&#x2014; and substituted by one or more polymerizable groups and/or radicals R, Ris H, a branched, cyclic or preferably linear Calkyl or Calkenyl radical, Ris a chemical bond, an n-valent aromatic radical or a branched, cyclic or preferably linear Calkylene radical, which can be interrupted one or more times by O, S or &#x2014;NR&#x2014; and substituted by one or more polymerizable groups, &#x2550;O and/or radicals R, n is 2 or 3 and m is 0 or 1. The compounds are particularly suitable as photoinitiators for radical polymerization and in particular for the production of dental materials.

Long-wave absorbing photoinitiators

Acyl germanium compound according to general formula [RAr&#x2014;(C&#x2550;O)&#x2014;]&#x2014;Ge and process for the preparation thereof. The compound is suitable as initiator for radical polymerization.

Acyl germanium photoinitiators and process for the preparation thereof

Process for preparing higher hydridosilanes of the general formula H&#x2014;(SiH)&#x2014;H where n&#x2267;2, in which&#x2014;one or more lower hydridosilanes&#x2014;hydrogen, and&#x2014;one or more transition metal compounds comprising elements of transition group VIII of the Periodic Table and the lanthanides are reacted at a pressure of more than 5 bar absolute, subsequently depressurized and the higher hydridosilanes are separated off from the reaction mixture obtained.

Process for preparing higher hydridosilanes

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Harald Stüger