Low-coordinate first-row transition metal complexes in catalysis and small molecule activation

Abstract

In this Perspective, we will highlight selected examples of transition metal complexes with low coordination numbers whose high reactivity has been exploited in catalysis and the activation of small molecules featuring strong bonds (N2, CO2, and CO).

Structural and electronic studies of substituted m-terphenyl lithium complexes

“…One important example is the m-terphenyl ligand, which has been repeatedly utilised in the isolation of low-coordinate main group and transition metal complexes. [1][2][3][4][5][6] Although a plethora of m-terphenyl frameworks have been designed, most studies have been structurally focused, aimed at investigating the effects of steric bulk on the geometries, bonding modes, and reactivities of the resulting compounds. [7][8][9][10][11][12][13][14][15][16][17][18] For instance, the solid state structures observed for a series of m-terphenyl lithium complexes vary depending on the steric demands of the flanking ortho-aryl substituents.…”

Design, facile synthesis, spectroscopic characterization, and medicinal probing of metal‐based new sulfonamide drugs: A theoretical and spectral study

“…650.00) showing its fragment at m/z = 254 to be highly stable (base peak). The other important mass fragments in their increasing abundance (%) were found as 650 (18) (42), and 781 (30). The base peaks of the metal complexes were found to be distinct in their m/z in relation to their ligand.…”

“…[ 29 ] The work emphasizes primarily on the pharmacology of those few compounds of first‐row transition metals that are cheaper, non‐toxic, and readily accessible for pharmacology. [ 30 ] In addition, these metal ions are the vital elements found in the biological intracellular atmosphere of living beings. [ 31 ] They are most abundantly found trace elements present in biological systems together with iron and most of the metalloproteins.…”

Towards Heteroleptic Dicoordinate CuII Complexes

“…Low-coordinate (often threecoordinate) complexes have been longstanding goals for synthetic work as they usually possess high reactivity as well as interesting properties. [2][3][4][5][6][7] Notably, three-coordinate Cu II carba-zolides were proposed by Fu and Jones as reactive intermediates in photoinduced Ullmann CÀ N coupling reactions which were observed by EPR spectroscopy after irradiation of Cu I carbazolides in the presence of iodobenzene. [5] However, all attempts to isolate this Cu II carbazolide failed as it rapidly decomposed in solution.…”