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Silsesquioxanes as models of silica supported catalyst I. [3‐(Diphenylphosphino)propyl]‐hepta[propyl]‐[octasilsesquioxane] and [3‐mercapto‐propyl]‐hepta[propyl]‐[octasilsesquioxane] as ligands for transition‐metal ions *
Author(s) -
Hendan Benedikt J.,
Marsmann Heinrich C.
Publication year - 1999
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/(sici)1099-0739(199904)13:4<287::aid-aoc844>3.0.co;2-p
Subject(s) - chemistry , siloxane , transition metal , nuclear magnetic resonance spectroscopy , metal , medicinal chemistry , catalysis , stereochemistry , polymer chemistry , organic chemistry , polymer
The ligand [3‐(diphenylphosphino)propyl]‐hepta[propyl]‐[octasilsesquioxane] (dpps) can be prepared by reacting [3‐chloropropyl]‐hepta[propyl]‐[octasilsesquioxane] (cs) with KP(Ph) 2 . The transition‐metal complexes [Rh(CO)(dpps) 2 Cl], [Rh(COD)(dpps)Cl] and [Pt(dpps) 2 Cl 2 ] are synthesized as models of functionalized silica‐gel surfaces. Without destruction of the siloxane cage, the intermediate compounds Hg(ss) 2 , and Pb(ss) 2 are obtained from [3‐mercaptopropyl]‐hepta[propyl]‐[octasilsesquioxane] (ssH). Starting from Pb(ss) 2 , the transition‐metal complexes [Au(ss)(P(Ph) 3 )], [Rh(ss)(CO) 2 ] 2 and [Rh(ss)(COD)] 2 are accessible. The compounds have been characterized mostly by 1 H, 13 C, 29 Si and 31 P NMR spectroscopy. Copyright © 1999 John Wiley & Sons, Ltd.