A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 1439-36-7, Name is 1-(Triphenylphosphoranylidene)propan-2-one, molecular formula is C21H19OP. In an article, author is Cabeza, Javier A.,once mentioned of 1439-36-7, Quality Control of 1-(Triphenylphosphoranylidene)propan-2-one.
The reactions of [Ru-3(CO)(12)] with four aromatic diazines have been studied in THF at reflux temperature. With phthalazine (L-1), the compound [Ru-3(mu-kappa(NN3)-N-2-N-2-L-1)(mu-CO)(3)(CO)(7)] (1), which contains an intact phthalazine ligand in an axial position bridging an Ru-Ru edge through both N atoms, is initially formed but it reacts with more phthalazine to give [Ru-3(kappa N-2-L-1)(mu-kappa(NN3)-N-2-N-2-L-1)(mu-CO)(3)(CO)(6)] (2), in which a pi-pi stacking interaction between the aromatic rings of both ligands determines their position in cluster axial sites on the same face of the Ru3 triangle. With quinazoline (HL2), the cyclometalated hydrido decacarbonyl derivative [Ru-3(mu-H)(mu-kappa(NC4)-N-2-C-3-L-2)(CO)(10)] (3) is initially produced but it partially decarbonylates under the reaction conditions to give [Ru-6(mu-H)(2)(mu-kappa(NC4)-N-2-C-3-L-2)(mu(3)-kappa(3)-(NNC4)-N-1-C-3-L-2)(CO)(19)] (4), which results from the displacement of a CO ligand of 3 by the uncoordinated N-1 atom of another molecule of 3. With 4,7-phenanthroline (H2L3), the stepwise formation of the cyclometalated derivatives [Ru-3(mu-H)(mu-kappa(NC3)-N-2-C-4-HL3)(CO)(10)] (5) and two isomers of [Ru-6(mu-H)(2)(mu(4)-kappa(NCNC8)-N-4-C-4-N-3-C-7-L-3)(CO)(20)] (6a, 6b) takes place. In compounds 6a and 6b, two Ru-3(mu-H)(CO)(10) trinuclear units are symmetrically (C-2 in 6a or C-S in 6b) bridged by a doubly-cyclometalated 4,7-phenanthroline ligand. With 2,3′-bipyridine (HL4), two products have been isolated, [Ru-3(mu-H)(mu-kappa N-2(3)’ C-4′-L-4)(CO)(10)] (7) and [Ru-3(mu-H)-(mu-kappa(NN3)-N-3-N-2’C-2′-L-4)(CO)(9)] (8). While compound 7 contains an N-3′ C-4′-cyclometalated 2,3′-bipyridine, in compound 8 an N-3′ C-2′-cyclometalation is accompanied by the coordination of the N-2 atom of the remaining pyridine fragment. The structures of compounds 2, 3, 4, 6a and 8 have been determined by X-ray diffraction crystallography.
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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem