TY - JOUR
T1 - Stopping Hydrogen Migration in Its Tracks
T2 - The First Successful Synthesis of Group Ten Scorpionate Complexes Based on Azaindole Scaffolds
AU - Da Costa, Rosenildo Correa
AU - Rawe, Benjamin W.
AU - Iannetelli, Angelo
AU - Tizzard, Graham J.
AU - Coles, Simon J.
AU - Guwy, Alan J.
AU - Owen, Gareth R
PY - 2019/1/7
Y1 - 2019/1/7
N2 - The first successful synthesis and characterization of group 10 complexes featuring flexible scorpionate ligands based on 7-azaindole heterocycles are reported herein. Addition of 2 equiv of either K[HB(azaindolyl)3] or Li[HB(Me)(azaindolyl)2] to [M(μ-Cl)(η,1η2-COEOMe)]2 leads to the formation of 2 equiv of the complexes [M{κ3-N,N,H-HB(azaindolyl)3}(η,1η2-COEOMe)] and [M{κ3-N,N,H-HB(Me)(azaindolyl)2}(η,1η2-COEOMe)] (where M = Pt, Pd; COEOMe = 8-methoxycyclooct-4-en-1-ide), respectively. In these reactions, the borohydride group is directed toward the metal center forming square based pyramidal complexes. In contrast to analogous complexes featuring other flexible scorpionate ligands, no hydrogen migration from boron is observed in the complexes studied. The fortuitous line widths observed in some of the 11B NMR spectra allow for a closer inspection of the B-H···metal unit in scorpionate complexes than has previously been possible.
AB - The first successful synthesis and characterization of group 10 complexes featuring flexible scorpionate ligands based on 7-azaindole heterocycles are reported herein. Addition of 2 equiv of either K[HB(azaindolyl)3] or Li[HB(Me)(azaindolyl)2] to [M(μ-Cl)(η,1η2-COEOMe)]2 leads to the formation of 2 equiv of the complexes [M{κ3-N,N,H-HB(azaindolyl)3}(η,1η2-COEOMe)] and [M{κ3-N,N,H-HB(Me)(azaindolyl)2}(η,1η2-COEOMe)] (where M = Pt, Pd; COEOMe = 8-methoxycyclooct-4-en-1-ide), respectively. In these reactions, the borohydride group is directed toward the metal center forming square based pyramidal complexes. In contrast to analogous complexes featuring other flexible scorpionate ligands, no hydrogen migration from boron is observed in the complexes studied. The fortuitous line widths observed in some of the 11B NMR spectra allow for a closer inspection of the B-H···metal unit in scorpionate complexes than has previously been possible.
UR - http://www.scopus.com/inward/record.url?scp=85058540029&partnerID=8YFLogxK
U2 - 10.1021/acs.inorgchem.8b02456
DO - 10.1021/acs.inorgchem.8b02456
M3 - Article (Academic Journal)
C2 - 30525534
AN - SCOPUS:85058540029
VL - 58
SP - 359
EP - 367
JO - Inorganic Chemistry
JF - Inorganic Chemistry
SN - 0020-1669
IS - 1
ER -