[INORG-19]Ligand substitution of osmaanthracyne

Aromatic metallacycles of transition metals have caught attention for a long period of time. Members of the monocyclic six-membered aromatic metallacycle family has been well studied. Naturally, the chemistry of aromatic metallacycles with a more extended structure is of interest. Our group has recently reported the synthesis of an osmaanthracyne complex (1) with a tricyclic system. This study focuses on the derivatization of this compound by ligand substitution reactions.

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[INORG-17] Understanding the diverse reactivity of pentaphenylborole toward epoxides

In this work, we report our systematic study on the diverse reactivity of pentaphenylborole toward different epoxides with the aid of DFT calculations. We have investigated how different substituents on epoxides influence the preference/competition of the three experimentally observed pathways, i.e. intramolecular proton transfer, direct ring expansion via insertion of one epoxide molecule, and ring expansion via insertion of two epoxide molecules. We also predict that when both Me and Ph substituents are present, the two pathways, intramolecular proton transfer and direct ring expansion, are highly competitive.

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[ANAL-26]Identification of nitro-aromatic compounds derived from lignin pyrolysis products using UPLC-Orbitrap MS in urban Guangzhou, China

Lignin can release various phenolic compounds through biomass burning. These lignin-derived phenols can be nitrated easily to form nitro-aromatic compounds (NACs) because of the strong electron-donating effect of the hydroxyl group and methoxy group on their benzene ring. With the outstanding ability of Orbitrap MS to resolve different ions, we classified a large group of complicated lignin-derived NACs, their probable structures contain more than one representative substituent group originated from lignin. Additionally, most of them correlate very well with the simple structured NACs throughout the whole sampling year, suggesting that those simple structured NACs may also derived from lignin burning.

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