The chemistry of Cp* based κ2-N,S-chelated ruthenium complex, [Cp*RuPPh3(κ2-N,S-(NC7H4S2)], 1 with different boranes has been explored. Room temperature reaction of 1 with BH3·THF and bulky boranes, such as, MesBH2 and...
The recent developments in the field of transition metal (TM) borate complexes have been a landmark in modern coordination chemistry. The structural diversities of these complexes play an important role in several catalytic processes. Generally, polypyrazolyl borate ligands, [BHn(pz)4‐n]− (n=1, 2; pz=pyrazolyl), popularly known as scorpionates have been used extensively for the preparation of TM borate complexes. The presence of multiple donor atoms in the flexible borate proligands led to several coordination modes. Based on the electronic and steric properties of these ligands and the metals, the denticity of borate ligands in TM complexes varied from κ0 to κ6. The presence of different bonding modes of these borate ligands made them very interesting in main group organometallic chemistry. In addition, cooperative activation of boranes by TM complexes containing metal‐nitrogen or metal‐sulfur bonds has become an alternative to the utilization of borate proligands for the synthesis of TM borate complexes. This review summarizes the advancements of the chemistry of TM borate complexes focusing exclusively on the synthetic methods and various bonding scenarios.
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