Papers by Berline Mougang-Soume
Journal of Chemical Sciences, Sep 1, 2015
New cadmium complexes of 4-methoxyphenyl dithiophosphinic acids, H 3 CO-C 6 H 4-(R)PS 2 Hwere pre... more New cadmium complexes of 4-methoxyphenyl dithiophosphinic acids, H 3 CO-C 6 H 4-(R)PS 2 Hwere prepared. The five dithiophosphinato ligands (L) involved were of the general structure H 3 CO-C 6 H 4-(R)PS − 2 with R= 3-methylbutyl, (L1); n-butyl, (L2); 2-methylpropyl, (L3); 1-methylpropyl, (L4) and 2-propyl, (L5). To the best of our knowledge, this is the first report on the preparation and characterization of the n-butylderivative. The acid forms of the ligands were obtained by treatment of the Lawesson reagent, (LR) [2,4-bis(4methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide] with the corresponding Grignard reagent in dry diethylether. The acids formed were transformed into easily crystallizable ammonium salts (NH 4 L) for purification. These salts were treated with CdCl 2 in ethanol at room temperature to produce the bis-dithiophosphinato cadmium complexes ([Cd(L) 2 ] 2) exclusively. The structures of the complexes were elucidated by elemental analysis, MS, FTIR and Raman spectroscopy techniques as well as 1 H-, 13 C-and 31 P-NMR. The crystal structures of [Cd(L1) 2 ] 2 and [Cd(L2) 2 ] 2 were also studied as examples. X-ray studies confirmed the nonplanar, fourcoordination geometry of the complexes and indicate that electron delocalization prevails in the PS − 2 moiety of the dithiophosphinato groups.
Journal of Molecular Structure, Feb 1, 2020
Phosphorus Sulfur and Silicon and The Related Elements, Jan 2, 2016
Chemistry - A European Journal, 2014
This contribution describes the reactivities of CO 2 , CO, O 2 , and ArNC with the pincer-type co... more This contribution describes the reactivities of CO 2 , CO, O 2 , and ArNC with the pincer-type complexes [(k P ,k C ,k P'-POC sp 3OP)NiX] (POC sp 3OP = (R 2 POCH 2) 2 CH; R = iPr; X = OSiMe 3 , NArH; Ar = 2,6-iPr 2 C 6 H 3). Reaction of the amido derivative with CO 2 and CO leads to a simple insertion into the NiÀN bond to give stable carbamate and carbamoyl derivatives, respectively, the pincer ligand backbone remaining intact in both cases. In contrast, the analogous reactions with the siloxide derivative produced kinetically labile insertion products that either revert to the starting material (in the case of CO 2) or react further to give the mixed-valent, dinickel species [(POC sp 3OP)Ni II {m,k O ,k P ,k P'-OCOCH(CH 2 CH 2 OPR 2) 2 }Ni 0 (CO) 2 ]. The zero-valent center in the latter compound is ligated by a new ligand arising from transformation of the POC sp 3OP ligand backbone. The carbonylation and carboxylation of the siloxido derivative also produced minor quantities of a side-product identified as the trinickel species, [{(h 3-allyl)-Ni(m O ,k P-R 2 PO) 2 } 2 Ni], arising from total dismantling of the POC sp 3OP ligand. Similar reactivities were observed with isonitrile, ArNC: reaction with the siloxido derivative resulted in a complex sequence of steps involving initial insertion, a 1,3hydrogen shift, and an Arbuzov rearrangement to give [Ni(CNAr) 4 ] and a methacrylamide based on fragments of the POC sp 3OP ligand. Oxygenation of the amido and siloxido derivatives led to the phosphinate derivative, [(POC sp 3OP)Ni(OP(O)R 2)], arising from oxidative transformation of the original ligand frame; the reaction with the Ni-NHAr derivative also gave ArHNP(O)R 2 through a complex NÀP bond-forming reaction. Scheme 1. Complex transformations of [(POC sp 3OP)NiX] .
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Angewandte Chemie International Edition, 2014
We describe the results of a study on the stabilities of pincer-type nickel complexes relevant to... more We describe the results of a study on the stabilities of pincer-type nickel complexes relevant to catalytic hydroalkoxylation and hydroamination of olefins, CÀC and CÀX couplings, and fluorination of alkyl halides. Complexes [(POC sp3 OP)NiX] are stable for X = OSiMe 3 , OMes (Mes = 1,3,5-Me 3 C 6 H 2), NPh 2 , and CC À H, whereas the O(tBu) and N(SiMe 3) 2 derivatives decompose readily. The phenylacetylide derivative transforms gradually into the zero-valent species cis-[{k P ,k C ,k C'-(iPr 2 POCH 2 CHCH 2)}Ni{h 2 ,k C ,k C'-(iPr 2 P(O)C-CPh)}]. Likewise, attempts to prepare [(POC sp3 OP)NiF] gave instead the zwitterionic trinuclear species [{(h 3-allyl)Ni} 2-{m,k P ,k O-(iPr 2 PO) 4 Ni}]. Characterization of these two complexes provides concrete examples of decomposition processes that can dismantle POC sp3 OP-type pincer ligands by facile C À O bond rupture. These results serve as a cautionary tale for the inherent structural fragility of pincer systems bearing phosphinite donor moieties, and provide guidelines on how to design more robust analogues.
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
RSC Adv., 2015
Compound NA3 bound inside the active site of the enzyme.
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
R factor = 0.042; wR factor = 0.116; data-to-parameter ratio = 14.6. In the title compound, C29H3... more R factor = 0.042; wR factor = 0.116; data-to-parameter ratio = 14.6. In the title compound, C29H32N2O5S2, the indole ring system is nearly planar, with a maximum deviation of 0.013 (2) Å, and the cyclohexenone ring has an envelope conformation with the methine C atom as the flap. The two methylbenzene rings are approximately perpendicular to each other, making a dihedral angle of 89.09 (8). In the crystal, N—H O hydrogen bonds link the molecules into a chain running along the a-axis direction, and weak C—H O hydrogen bonds and C—H interactions are observed between the chains. Related literature For tetrahydrocarbazole systems present in the framework of a number of indole-type alkaloids of biological interest, see: Saxton (1983). For related structures, see: Hökelek et al. (2009); Çaylak et al. (2007); Uludag ̆ et al. (2009); Gündoğdu et al. (2011). For the use of tetrahydrocarbazolone in the synthesis of central-nervous-system-active drugs, see: Romeo et al. (2006). For the sy...
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Papers by Berline Mougang-Soume