Advances in the chemistry of alkyne-substituted homo- and heterometallic carbonyl clusters of the iron, cobalt and nickel triads. An update

Multimetallic Catalysis Based on Heterometallic Complexes and Clusters

“…Synthetic inorganic chemists have shown great skills at creating new metal–metal bonds and building and characterizing novel and fascinating architectures in the field of heterometallic transition metal clusters . In these complex molecules, the presence of direct metal–metal interactions offers the unique advantage of bringing metal centers of a different nature in close proximity, thus favoring multisite interactions with substrates leading to a molecular activation that mononuclear complexes (or even homomultinuclear clusters) are not able to achieve.…”

Dense Alkyne Arrays of a Zr(IV) Metal–Organic Framework Absorb Co2(CO)8 for Functionalization

“…In this context, the alkyne function presents a curious case. On the one hand, alkyne units, as chemically soft groups, are known to form π-complexes (e.g., via η 2 -alkyne bonds) with soft metal centers such as Ag­(I) and Au­(I); − alkyne groups are also reacted with Co 2 (CO) 8 , Fe 3 (CO) 12 , and other metal carbonyls to form complexes in solution chemistry investigations. , On the other hand, alkyne groups have been largely left out as secondary donors for metal uptake in the design of MOF materials. Such scarcity is surprising, as alkyne groups generally withstand the solvothermal conditions of MOF synthesis: cases are known where the alkyne units are built into side chains branching off the MOF backbone and are therefore poised to act as secondary donors …”

Catalyzed M–C coupling reactions in the synthesis of σ-(pyridylethynyl)dicarbonylcyclopentadienyliron complexes

“…Metal s-alkynyl complexes displaying such peculiar characteristics as linear geometry, high stability, and p-unsaturated character have been demonstrated to constitute promising building blocks for the design of materials, which can possess such properties as optical nonlinearity, [1][2][3][4][5] light-emission, [6][7][8][9][10][11][12] and electrical conductivity. [13][14][15][16][17][18] Moreover, they are an important class of coordination compounds because of their relevance in synthetic chemistry [19][20][21][22][23][24] and proton reduction catalysis. [25][26][27] A variety of methods for the synthesis of transition metal acetylides have been developed.…”