14494-85-0Relevant academic research and scientific papers
Ferrocenyloxazoline-Derived Planar Chiral Palladacycles: C-H Activation, Transmetalation, and Reversal of Diastereoselectivity
Arthurs, Ross A.,Hughes, David L.,Richards, Christopher J.
, p. 4271 - 4279 (2019)
Reinvestigation of the palladation of (S)-2-ferrocenyl-4-(methylethyl)oxazoline with Pd(OAc)2 in CH2Cl2 was found to proceed with a dr of 3.6:1 in favor of the resulting S,Sp palladacycle. A similar 4:1 dr was o
Synthesis and Reactivity of Selones and Dihaloselones: Complexation of Selones with d8- and d10-Metal Ions
Yadav, Sangeeta,Singh, Harkesh B.,Butcher, Ray J.
, p. 2968 - 2979 (2017/06/28)
The reactivities of the monodentate selone LSe (L = 1,3-dibutylbenzimidazol-2-ylidene; 10a), the bidentate pyridine-functionalized selone L′Se (L′ = 1-pyridyl-3-butylimidazol-2-ylidene; 10b) and the multidentate ether-functionalized selone L′′Se {L′′ = 1,3-bis[2-(2-methoxyethoxy)ethyl]benzimidazol-2-ylidene; 10c} with soft transition-metal halides (PdX2, PtX2, ZnX2, CdX2 and HgX2; X = Cl, Br, I) are probed. Compounds 10a and 10c react with metal halides to give complexes of the type [Cu2(μ-X)2(LSe)2] (X = Br, I; 11, 12), [MX2(LSe)2] (13–22) or [M2X2(μ-X)2(L′′Se)2] (X = Cl, Br, I; 26–32), whereas 10b and HgX2 (X = Cl, Br, I) form 1:1 complexes HgX2(L′Se) (21–23), in which the pyridine moiety coordinates to the metal centre to form a six-membered chelate. The reactivity of 10a was compared with those of triphenylphosphine and triethylamine. The reaction of 10c with molecular iodine yields the diiodoselone L′′SeI2 (35), which disproportionates to give the selone adduct of the iodonium ion, [(L′′Se)2I]+I3– (36). The reactions of LSeX2 [X = Cl (34a), Br (34b), I (34c)] with organotellurium compounds, namely, tellone LTe (10d) and diphenyl telluride (37), afford the dihalotellones LTeX2 [X = Cl (38a), Br (38b), I (38c)] and Ph2TeX2 [X = Cl (39a), Br (39b), I (39c)], respectively. The oxidizing properties of LSeX2 (34a–34c) were investigated with rare-earth metals.
Thermal decomposition of complexes of cadmium(II) and mercury(II) with triphenylphosphanes
Verma,Verma,Bhushan,Verma
, p. 725 - 729 (2008/10/09)
A series of substituted triphenylphosphane complexes of the type CdL 2X2 (L= triorthotolylphosphane or trimetatolylphosphane; X=Cl-, Br- or I-) and HgL2X 2 (L=triphenylphosphane or triorthotolylphosphane) was prepared fresh. The thermal decomposition was carried out in air with heating rate programmed at 10°C min-1 and it revealed that the complexes with ortho derivative were less stable and the triphenylphosphane moiety leaves along with halogen in the first step. All the complexes were stable up to 210°C. However, the stability order of the tetrahedral complexes was X=Cl>Br. Values of n, E, lnA and ΔS # have been approximated and compared. Complexes having Br have higher E a, lnA and ΔS # values than that having Cl.
Symmetrization reaction of mercurated ferrocenylimines. X-ray crystal structure of [Hg{(η5-C5H5)Fe(η5-C5H3CPh=NC6H4-4-Br)}2]
Liu, Yuan Hong,Wu, Yang Jie,Huo, Shou Quan,Yuan, Han Zhen
, p. 7 - 13 (2007/10/03)
The symmetrization reaction of mercurated anils of benzoylferrocene 1 was easily achieved by refluxing 1 and PPh3 in CHCl3 solution, and afforded the symmetrized products [Hg{(η5-C5H5)Fe(η5-C5H3CPh=NAr)}2] (Ar = a variety of substituted phenyls and β-naphthyl) 2. During the reaction the organometallic complex salts [RHgPPh3]C1 formed; this can disproportionate to give the symmetrized products. The molecular structure of [Hg(η5-C5H5)Fe(η5-C5H3CPh=NC6H4-4-Br)}2] has been determined by single-crystal X-ray analysis. It crystallizes in the triclinic space group P1, with a = 13.001(4), b = 13.029(2), c = 12.236(2)A, a = 103.00(1), β = 104.10(2), γ = 78.86(2)° and Z = 2. Refinement led to R = 0.027 (Rw = 0.037) using 3271 unique reflections with I > 3σ(I). The distance between N(2) and Hg is 2.981(6) A, shorter than the sum of van der Waals radii of N and Hg (3.05-3.15 A), indicating an intramolecular coordination of N(2) and Hg. The 1H NMR spectra of [Hg{(η5-C5H5)Fe(η5-C5H3CPh=NAr)}2] (Ar = C6H4-2-C1 and 2-naphthyl) show that both compounds exist as rotamers in solution.
Solid-state 31P CP-MAS NMR study of phosphine complexes of mercury(II)
Allman, Tim,Lenkinski
, p. 3202 - 3204 (2008/10/08)
The solid-state 31P CP-MAS NMR spectra of several phosphine complexes of mercury(II) with known crystal structures have been measured. In addition, some simple valence bond calculations were performed and an attempt was made to relate calculate
Chemical dissection and reassembly of a mixed-metal cluster, Hg9Co6(CO)18
Ragosta, Joseph M.,Burlitch, James M.
, p. 1517 - 1518 (2008/10/08)
The cluster Hg9Co6(CO)18 reacts with compounds of type HgX2 to form new monocobalt compounds, (CO)3Co(HgX)3 (X = I, Cl, O2CCF3). The iodo derivative was used to prepare (CO)3Co(HgI)3I- Bu4N+, (CO)3Co(HgO3SC6H4CH 3)3, and (CO)3Co(HgPh)3. Addition of PPh3 to (CO)3Co(HgCl)3 caused reassembly of Hg9-Co6(CO)18 in high yield.
A 31P and 199Hg nuclear magnetic resonance and vibrational spectroscopic study of triarylphosphine complexes of HgCl2
Allman, Tim,Goel, Ram G.
, p. 615 - 620 (2007/10/02)
Complexes of the type 2 and HgCl2(P(4-XC6H4)3)2 (x = Me2N, MeO, Me, H, F, Cl) have been prepared.The tertiary phosphines have similar steric requirements but vary gratly in their basicities.The vibrational spectra of the complexes were measuredand each complex was found to have the expected bridging dimeric (1:1) or pseudotetrahedral monomeric (1:2 Hg/P) structure.Their 31P and 199Hg nmr parameters were investigated and is was found that J(Hg-P) increases with increasing phosphine basicity, decreasing temperature, and decreasing sample concentration in dichloromethane solution.It is concluded that changes in the hybridisation on the P and Hg atoms may be largely responsible for increases of J(Hg-P) with increasing phosphine basicity.
