prov:value
| - For instance a preferred catalyst precursor is of the formula MX2[Arene][P(R4)3]L1 wherein M is osmium or, preferably, ruthenium; X is a halogen such as bromine, iodine or, preferably, chlorine and R4 is hydrogen, alkyl, cycloalkyl, aryl or aralkyl, preferably, cyclohexyl; L1 is P(R4)3, imidazoylidene, or dihydroimidazoylidenes or, preferably, 1,3-bis-(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-
|