Since the prediction of the existence of metallabenzenes in 1979, metallaaromatic chemistry
has developed rapidly, due to its importance in both experimental and theoretical fields …

Comprehensive Summary Metallacyclopentadienes play a vital role in transition‐metal
mediated and catalyzed cycloaddition reactions of alkynes. Though versatile reactions of …

The first rhena-analogues of pyridinium (cyclopropametalla-2-isoquinolinium complexes)
are obtained from o-ethynyl benzonitriles. Structural analysis and DFT calculations confirm …

A convenient synthetic route to polycyclic metallaaromatics containing main-group
heteroatoms has been developed. The first cyclopropametalla-2-benzopyrylium complexes …

Main observation and conclusion The reaction of a cyclic osmacarbyne complex with
sodium azide led to the formation of a ring expansion‐annulation product, a unique tetrazole …

The direct C–H amidation or imidation of metallaaromatics with N-bromoamides or imides
has been achieved under mild conditions and leads to the formation of a family of N …

The fulvenallene molecule (C7H6) has been synthesized via the elementary gas-phase
reaction of the methylidyne radical (CH) with the benzene molecule (C6H6) on the doublet …

Synthesis and characterization of metallacycles is an important research issue because they
have acted as important building blocks and key intermediates in synthetic and catalytic …

Over the past decade, significant research efforts have focused on osmapentalyne,
characterized by the more reactive Os≡ C7 (Carbon atoms numbered in a clockwise …

Due to the linear property around an acetylenic carbon, the introduction of such an atom to a
small cycle would result in high ring strain. Currently, the smallest isolated rings are five …