.~ By alkyl transfer, e.g., disproportionation, etc. {4}
646
.~.~ Using catalyst containing Mo, Re, or W and another transition metal
DEFINITION
Classification: 585/646
Using catalyst containing Mo, W, or Re and another transition metal:
(under subclass 643) Subject matter wherein the reaction employs as a catalyst a material containing molybdenum, tungsten, or rhenium and in addition a transition metal other than these three.
(1) Note. A transition metal is one in which an inner electron shell, rather than an outer shell, is partially filled. In the periodic table transition metals include elements 21 through 30 (scandium through zinc), 39 through 48 (yttrium through cadmium), 57 through 80 (lanthanum through mercury), and 89 through 103 (actinium through lawrencium).
