Transition metal boryl complex

File:GenericMetal-Boryls.png

In chemistry, a transition metal boryl complex is a molecular species with a formally anionic boron center coordinated to a transition metal.{{cite journal|title=Transition Metal−Boryl Compounds: Synthesis, Reactivity, and Structure|author1=Geoffrey J. Irvine|author2=M. J. Gerald Lesley|author3=Todd B. Marder|author4=Nicholas C. Norman|author5=Craig R. Rice|author6=Edward G. Robins|author7=Warren R. Roper|author8=George R. Whittell|author9=L. James Wright|journal=Chem. Rev.|volume=98|pages=2685–2722|year=1998|issue=8|doi=10.1021/cr9500085|pmid=11848976}} They have the formula L_nM-BR₂ or L_nM-(BR₂LB) (L = ligand, R = H, organic substituent, LB = Lewis base). One example is (C₅Me₅)Mn(CO)₂(BH₂PMe₃) (Me = methyl).{{cite journal|author1=Staubitz, A.|author2=Robertson, A. P. M.|author3=Sloan, M. E.|author4=Manners, I.|title=Amine− and Phosphine−Borane Adducts: New Interest in Old Molecules|journal=Chem. Rev.|year=2010|volume=110|issue=7|pages=4023–4078|doi=10.1021/cr100105a|pmid=20672859}} Such compounds, especially those derived from catecholborane and the related pinacolborane, are intermediates in transition metal-catalyzed borylation reactions.

File:KUHPAG.png)₄RhB(pinacolate).{{cite journal|author1=C.Borner|author2=K.Brandhorst|author3= C.Kleeberg|journal=Dalton Trans.|year=2015|title=Selective B–B bond activation in an unsymmetrical diborane(4) by [(Me₃P)₄Rh–X] (X = Me, OtBu): a switch of mechanism?|volume=44|issue=18|pages=8600–8604|doi=10.1039/C5DT00618J|pmid=25868980|doi-access=free}} (color code: pink=B, blue green=Rh, red=O, orange=P).]]