Pd
<sup>II</sup>
(P‐P) Derivatives of o‐Quinone Annulated with Dithiete Cycle: Electrochemical Properties and Coordination Regioisomerism
作者:Konstantin A. Martyanov、Gleb A. Abakumov、Evgeny V. Baranov、Vera V. Khrizanforova、Mikhail N. Khrizanforov、Kirill V. Kholin、Yulia H. Budnikova、Viacheslav A. Kuropatov、Vladimir K. Cherkasov
DOI:10.1002/ejic.202000771
日期:2020.12.13
bidentate phosphines was studied. Excluding the case of 1,2‐bis(diphenylphosphino)ethane (dppe) species, the formation of corresponding dithiolates with high yields was observed. Coordination of palladium to the dithiolene site of bifunctional ligand causes a distortion of the dioxolene site as well as significant decrease of its electron‐acceptor ability. The formation of both catecholate and dithiolate
New sterically-hindered o-quinones annelated with metal-dithiolates: regiospecificity in oxidative addition reactions of a bifacial ligand to the Pd and Pt complexes
作者:K. A. Martyanov、V. K. Cherkasov、G. A. Abakumov、M. A. Samsonov、V. V. Khrizanforova、Y. H. Budnikova、V. A. Kuropatov
DOI:10.1039/c6dt00769d
日期:——
annelated dithiete ring towards coordination at a dithiolene site has been discovered. New Pd and Pt dithiolate complexes have been synthesized. The reaction proceeds regioselectively, and the quinone site of the parent ligand is not affected even while using an excess of the metal complex. Both Pt and Pdcomplexes display a square planar surrounding for the metal ion and have very similar NMR, IR and
Dithiolate and Catecholate Binding of Copper by the OO∼SS Bifunctional Ligand: Regioselectivity and Regioisomeric Transformations
作者:Viacheslav A. Kuropatov、Anna V. Cherkasova、Konstantin A. Martyanov、Anton V. Cherkasov、Andrey G. Starikov、Vladimir K. Cherkasov
DOI:10.1002/ejic.202100517
日期:2021.8.26
majority of Pd, Pt or alkali metal containing metallofragments are regioselectively bound either by dithiolene or dioxolene site of the DitQ, whereas Cu(II) adducts with phenanthroline or bipyridine display equilibrium between catecholate and dithiolate forms. To the best of our knowledge this is a rare example of equilibrium between regioisomeric coordination compounds. We determined the energetic
Regioselective activation of dioxolene coordination site was observed in reactions of Ni(CO)4 and bifunctional o-quinone, annulated with dithiete cycle (ditQ). Novel hexacoordinated bis(o-semiquinonato) nickel complexes Ni(ditSQ)2(THF)2 (1), Ni(ditSQ)2(Py)2 (2), Ni(ditSQ)2(2,2′-bpy) (3) and Ni(ditSQ)2(4-NIT-Py)2 (4) (4-NIT-Py = 2-(4-pyridinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) were obtained