| http://www.w3.org/ns/prov#value | - In addition, the electron donor compound can advantageously also be selected from silicon compounds of the general formula Ra 5Rb 6Si(OR7)c, where a and b are integers from 0 to 2, c is an integer from 1 to 3 and the sum (a+b+c) is 4; R5, R6, and R7, are alkyl, cycloalkyl or aryl radicals with 1 to 18 carbon atoms optionally containing heteroatom.
|
