93768-83-3Relevant academic research and scientific papers
Rapid Access to Derivatized, Dimeric, Ring-Substituted Dichloro(cyclopentadienyl)rhodium(III) and Iridium(III) Complexes
Brown, Loren C.,Ressegue, Emily,Merola, Joseph S.
, p. 4014 - 4022 (2017/01/09)
The present work describes the design and synthesis of a series of rhodium and iridium dimers [(η5-ring)MCl]2(μ2-Cl)2 (where (η5-ring)MCl = (η5-Me4C5R)Rh(III)Cl or (η
Extending the range of pentasubstituted cyclopentadienyl compounds: The synthesis of a series of tetramethyl(alkyl or aryl)cyclopentadienes (Cp?R), their iridium complexes and their catalytic activity for asymmetric transfer hydrogen
Morris, David M.,McGeagh, Michael,De Pe?a, David,Merola, Joseph S.
, p. 120 - 135 (2015/02/19)
Tetramethyl(alky or aryl)cyclopentadienes were synthesized and the organometallic half-sandwich iridium complexes of the form [(η5-Cp?R)Ir(aa)Cl], Cp?R = tetramethyl(phenyl)cyclopentadienyl (Cp?
Alkyne hydroamination and trimerization with titanium bis(phenolate) pyridine complexes: Evidence for low-valent titanium intermediates and synthesis of an ethylene adduct of titanium(II)
Tonks, Ian A.,Meier, Josef C.,Bercaw, John E.
, p. 3451 - 3457 (2013/07/26)
A class of titanium precatalysts of the type (ONO)TiX2 (ONO = pyridine-2,6-bis(4,6-di-tert-butylphenolate); X = Bn, NMe2) has been synthesized and crystallographically characterized. The (ONO)TiX2 (X = Bn, NMe2, X2 = NPh) complexes are highly active precatalysts for the hydroamination of internal alkynes with primary arylamines and some alkylamines. A class of titanium imido/ligand adducts, (ONO)Ti(L)(NR) (L = HNMe2, py; R = Ph, tBu), have also been synthesized and characterized and provide structural analogues to intermediates on the purported catalytic cycle. Furthermore, these complexes exhibit unusual redox behavior. (ONO)TiBn2 (1) promotes the cyclotrimerization of electron-rich alkynes, likely via a catalytically active TiII species that is generated in situ from 1. Depending on reaction conditions, these TiII species are proposed to be generated through Ti benzylidene or imido intermediates. A formally TiII complex, (ONO)Ti II(η2-C2H4)(HNMe2) (7), has been prepared and structurally characterized.
Preparation and characterization of (C5Me4Ph)TiCl3, the oxochloride complexes [(C5Me4Ph)TiCl2]2( μ-O) and [(C5Me4Ph)TiCl( μ-O)]3 and the oxo-complex [(C5Me4Ph)Ti]4( μ-O)6
Bjoergvinsson, Mar,Halldorsson, Snorri,Arnason, Ingvar,Magull, Joerg,Fenske, Dieter
, p. 207 - 215 (2007/10/03)
The titanium compound (C5Me4Ph)TiCl3 (1) can be prepared by the reaction of (C5Me4Ph)SiMe3 with TiCl4. Hydrolysis of 1 in the presence of HNEt2 or Ag2O has allowed for the isolation of the oxochloride complexes [(C5Me4Ph)TiCl2]2( μ-O) (2) and [(C5Me4Ph)TiCl( μ-O)]3 (3), respectively. The NMR spectra of 3 are consistent with a nearly flat Ti3O3 ring having down-up-up or E-Z-Z arrangement of (C5Me4Ph)-ligands around the ring. The X-ray crystal structure of 2 (monoclinic, space group C2/c, a = 19.847(12), b = 9.089(5), c = 20.405(13) A, β = 124.06(5)°) consists of trans [(C5Me4Ph)TiCl2]2( μ-O) molecules of C2 symmetry with nearly linear Ti-O-Ti units (169.3(2)°). Reaction of 1 with an excess of H2O/HNEt2 results in the formation of the oxo-complex [(C5Me4Ph)Ti]4( μ-O)6 (4). The X-ray crystal structure of 4 (triclinic, space group P1, a = 11.861(5), b = 12.706(5), c = 18.218(8) A, α = 87.58(3)°, β = 89.00(3)°, γ = 86.60(3)°) reveals that the molecules of 4 have an adamantane-like Ti4O6 cage of nearly Td symmetry. The NMR spectra and molecular structures of 1, 2, 3 and 4 are discussed.
