The production of synthetic ammonia remains dependent on the energy-and capital-
intensive Haber–Bosch process. Extensive research in molecular catalysis has …

Transition metal–sulfur (M–S) compounds are an indispensable means for biological
systems to convert N2 into NH3 (biological N2 fixation), and these may have emerged by …

Nitrogenase enzymes are used by microorganisms for converting atmospheric N2 to
ammonia, which provides an essential source of N atoms for higher organisms. The active …

The iron–molybdenum cofactor of nitrogenase (FeMoco) catalyzes fixation of N2 via Fe
hydride intermediates. Our understanding of these species has relied heavily on the …

Iron-sulfur clusters are critical to a plethora of biological processes; however, little is known
about the elementary unit of these clusters, namely, the [Fe= S] n+ fragment. Here, we report …

Iron compounds containing a bridging oxo or sulfido moiety are ubiquitous in biological
systems, but substitution with the heavier chalcogenides selenium and tellurium, however, is …

Binding of N2 by nitrogenase requires a reductive activation of the FeMo-cofactor, but the
precise structure and atomic composition of FeMoco in its activated form is not well …

The reduction of dinitrogen (N2) is essential for its incorporation into nucleic acids and
amino acids, which are vital to life on earth. Nitrogenases convert atmospheric dinitrogen to …

Locally high-spin iron hydrides are proposed to play a critical role as intermediates in iron–
molybdenum cofactor (FeMoco)-catalyzed N2 fixation. Inspired by these biological systems …

Transition metal carbyne complexes are of fundamental importance in carbon-carbon bond
formation, alkyne metathesis, and alkyne coupling reactions. Most reported iron carbyne …