The Reactions of Two New Alkoxy-silyl Functionalized Alkynes with M3(CO)12 {M = Fe, Ru} and Co2(CO)8. Spectroscopic Identification of the Products

Reactions of Co2(CO)8 and of Co2(CO)6L (L=3-pentyn-1-ol, 1,4-butyn-diol or 2-methyl-3-butyn-2-ol) with 2(diphenylphosphino)ethyl-trietoxysilane and tris(hydroxymethyl)phosphine for applications to new sol–gel materials

“…As a consequence, products different from those expected are obtained, usually in low yields [7]. More recently, however, we found that 2(diphenylphosphino)ethyl-triethoxysilane (dpts) reacts with Ru 3 (CO) 12 forming the substituted complexes Ru 3 (CO) 12Àn L n [L = Ph 2 P(CH 2 ) 2 Si(OCH 2 CH 3 ) 3 ; n = 1,2] in high yields and that these complexes can be easily grafted to the mesoporous silica materials SBA-15 and MCM-41 [9].…”

“…By exploiting the reactivity of the cobalt-coordinated pol it was possible to build a new coordinated ligand [7]. Indeed (1) reacts with tsi to give good yields of the new complex Co 2 (CO) 6 [H 3 CC"CCH 2 CH 2 OC(@O)NH(CH 2 ) 3 Si(OEt) 3 ] (9) which has been characterized by spectroscopic analyses.…”

“…These syntheses are however made difficult because of exchange reactions between the coordinated alkynols and the sol-gel materials and mostly because several alkynols undergo loss of their functionalities when reacted with iron [4] or ruthenium [5] carbonyls. We have therefore attempted the synthesis of new ligands by reacting the alkynols with triethoxysilyl-propyl-isocyanate (tsi) [(H 3 CCH 2 O) 3 Si(CH 2 ) 3 NCO] [6] and other alkoxysilyl-contaning ligands [7].…”