Sm—Co—Cu system

Fig. 14.146. Phase diagram of the Sm-Co-Cu systems reproducing the investigated alloys. The shaded area marks the region of useful magnetic properties (Menth, 1975).

Shkatova, T.M., V.F. Terekhova and E.M. Savitzky, 1979, Investigation of the Sm-Co-Cu system alloys, in Alloys of rare and high-melting metals with unique physical behaviours, 1979 (Nauka, Moscow) pp. 179-182. 

For the gallides, according to Gladyshevsky et al. (1990) existence ranges have been observed for the Y-Fe-Ga, Pr-Fe-Ga, Pr-Cu-Ga, Nd-Fe-Ga, Sm-Fe-Ga, Sm-Cu-Ga, Tb-Fe-Ga, Dy-Fe-Ga, Dy-Co-Ga, Ho-J e-Ga, Ho-Cu-Ga, Er-Mn-Ga, Er-Fe-Ga, Tm-Fe-Ga and Yb-Fe-Ga systems. In some systems there exist compounds with a stoichiometry which is different from superstructure CeMn4Alg, but with a limited composition close to RTs sGa iS where R = Sm, Dy, Yb and Lu. Additionally, one should notice that gallides are formed also with Co, particularly, that with the special stoichiometry. 

Alkynylations Catalyzed by Other Transition Metals While a number of transition metals, including Ag, Au, Co, In, Rh, Ru, and even rather scarce Sm, have occasionally been reported to possess a distinct catalytic activity in the Sonogashira cross-coupling [28, 147], industrially relevant, cheaper Cu, Ni, and Fe experienced by far the most scientific attention. In the 1990s, Miura et al. [9] have discovered that various aryl and vinyl iodides could be coupled with terminal alkynes in a Cu-catalyzed reaction at elevated temperatures in DMF or DMSO with added PPhj and base. This initial finding has sparked further research efforts toward more sophisticated Cu-based catalytic systems. 

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