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[TOP] Nature Chemistry: Realizing a Brand-new Aromatic System, Metallapentalyne. (2013-06-23)

Aromaticity, one of the most fundamental concepts in organic chemistry, provides intrinsic stabilisation for cyclic compounds as a result of the delocalisation of π electrons. Currently, aromatic compounds (e.g., benzene, benzene derivatives, porphyrins, fullerenes, carbon nanotubes and graphene) have been applied in almost every field, including chemical engineering, biomedicine, materials science, energy science and environmental science.

Nature Communications: Successive Modification of Polydentate Complexes Gives Access to Planar Carbon- and Nitrogen-based Ligands(2019-04-03)

Polydentate complexes containing combinations of nitrogen and carbon (N and C) ligating atoms are among the most fundamental and ubiquitous molecules in coordination chemistry, yet the formation of such complexes with planar high-coordinate N/C sites remains challenging. Herein, we demonstrate an efficient route to access related complexes with tetradentate CCCN and pentadentate CCCCN and NCCCN cores by successive modification of the coordinating atoms in complexes with a CCCC core.

Constraint Of A Ruthenium-Carbon Triple Bond To A Five-Membered Ring(2018-06-22)

The incorporation of a metal-carbon triple bond into a ring system is challenging because of the linear nature of triple bonds. To date, the synthesis of these complexes has been limited to those containing third-row transition metal centers, namely, osmium and rhenium. We report the synthesis and full characterization of the first cyclic metal carbyne complex with a second-row transition metal center, ruthenapentalyne.

Carbolong Chemistry: A Story of Carbon Chain Ligands and Transition Metals(2018-06-21)

The construction of metal–carbon bonds is one of the most important issues of organometallic chemistry. However, the chelation of polydentate ligands to a metal via several metal–carbon bonds is rare. Metallapentalyne, which can be viewed as a 7-carbon (7C) chain coordinated to a metal via three metal–carbon bonds, was first reported in 2013.

Reactions of Cyclic Osmacarbyne with Coinage Metal Complexes (2018-05-23)

The reactions of the five-membered cyclic osmacarbyne complex, i.e., osmapentalyne, with a complete set of coinage metal (Cu, Ag, and Au) complexes have been investigated. Osmapentalyne 1 reacts with CuCl or AuCl(PPh3) via its metal–carbon triple bond, leading to the formation of osmapentalyne-copper(I) chloride adduct 2 or osmapentalyne-gold(I)-triphenylphosphine adduct 3, respectively. Moreover, it can react with AgOTf in the presence of 1,10-phenanthroline to give osmapentalyne-silver(I)-phenanthroline adduct 4.