Reaction of the aryltin(ii) hydrides with molybdenum carbonyl afforded Mo(CO)5{Sn(AriPr6)H}, (1), or Mo(CO)5{Sn(AriPr4)(THF)H} (2), respectively, in which 1 reacted with carbon dioxide, to yield Mo(CO)5{Sn(AriPr6)(κ2-O,O′-O2CH)}, (3).

Four cobalt(II) complexes supported by the tripodal ligand tris-(2-pyridylmethyl)amine (TPA) and ancillary coordinated anion (X), [Co(TPA)X] + (X = Cl-, Br-, Iand NCS-) (14), have been prepared. Magnetic susceptibility measurement and electronic spectroscopy indicate that they are five-coordinated high spin cobalt(II) complexes. The structures of 24 have been determined by X-ray crystallography. Reduction of CO 2 to CO has been observed upon irradiation of complexes 14 in the presence of fac-Ir(ppy) 3 (ppy = C-deprotonated 2phenylpyridine anion) and under CO 2 atmosphere using blue LEDs. All of these Co complexes were found to be efficient and stable CO 2 reduction catalyst with TON(CO) > 1000 and CO selectivity > 90% under 65 hours of irradiation. Among them, [Co(TPA)Br] + showed the best performance in CO 2 reduction with TON(CO) > 1400 after 65 h. The coordinated anion X played an important role in the photo-catalysis. Density functional theory (DFT) calculation has also been performed to examine the mechanism and role of coordinated anion X in visible-light induced CO 2 reduction.

The direct reactions of the large terphenyl thiols HSAr iPr4 (Ar iPr4 = −C 6 H 3 -2,6-(C 6 H 3 -2,6-iPr 2 ) 2 ) and HSAr iPr6 (Ar iPr6 = −C 6 H 3 -2,6-(C 6 H 2 -2,4,6-iPr 3 ) 2 ) with stoichiometric amounts of mesitylcopper(I) in THF at ca. 80 °C afforded the first well-characterized dimeric copper thiolato species {CuSAr iPr4 } 2 (1) and {CuSAr iPr6 } 2 (2) with elimination of mesitylene. The complexes 1 and 2 were characterized by NMR and electronic spectroscopy as well as by X-ray crystallography. They have dimeric Cu 2 S 2 core structures in which the two copper atoms are bridged by the sulfurs from the thiolato ligands and feature short Cu--Cu distances near 2.4 Å as well as a weak copper-flanking aryl ring interaction from a terphenyl substituent. The structures of the planar Cu 2 S 2 cores bear a resemblance to the Cu A site in nitrous oxide reductase in which two cysteines also bridge two copper atoms. The related dimeric Li 2 S 2 structural motif was also observed in the lithium congeners {LiSAr iPr4 } 2 (3) and {LiSAr iPr6 } 2 (4) which were synthesized directly from the thiols and n-BuLi in hexanes. However, despite the very similar effective ionic radii of the Li + (0.59 Å) and Cu + (0.60 Å) ions, the Li--Li structures display very much longer (by more than ca. 0.5 Å) separations than the corresponding Cu--Cu distances in 1 and 2, which may be due to weaker dispersion interactions.

An effective method to synthesize gold nanoclusters that can specifically recognize fibroblast growth factor receptor2 (FGFR2) was reported.