New Cyclosiloxanolate Cluster Complexes of Transition Metals

Alkali-Metal-Directed Hydrolytic Condensation of 3-Mercaptopropyltrimethoxysilane

“…It was found that properties of metal cations can influence the structure of the formed moieties since they work as template centers and structural elements helping to bind siloxane bonds into cyclic organosiloxanolate fragments [20][21][22][23][24][25][26][27][28][29][30][31][32]. While transition or rare-earth metal cations lead to the formation of varied-size (n=4 [20], 5 [21], 6, 8, 12 [22][23][24]) cyclic species, sodium and potassium cations enable the synthesis of small cyclosiloxanes containing three [25][26][27][28] or four [29][30][31] silicon atoms. Reaction parameters (the amount of water, type of organosilane and solvent) also can affect the ring size of cyclic products [32].…”