326002-95-3Relevant academic research and scientific papers
A heterobimetallic tetrahedron from a linear platinum(II)-bis(acetylide) metalloligand
Engeser, Marianne,Hardy, Matthias,Lützen, Arne
, p. 2701 - 2708 (2020/12/01)
Employing 4-ethynylaniline as a simple organic ligand we were able to prepare the stable trans-bis(acetylide)platinum(II) complex [Pt(L1)2(PBu3)2] as a linear metalloligand. The reaction of this metalloligand with iron(II) cations and pyridine-2-carbaldehyde according to the subcomponent self-assembly approach yielded decanuclear heterobimetallic tetrahedron [Fe4Pt6(L2)12](OTf)8. Thus, combination of these two design concepts - the subcomponent self-assembly strategy and the complex-as-a-ligand approach - ensured a fast and easy synthesis of large heterobimetallic coordination cages of tetrahedral shape with a diameter of more than 3 nm as a mixture of all three possible T-, S4- and C3-symmetric diastereomers. The new complexes were characterized by NMR and UV-vis spectroscopy and ESI mass spectrometry. Using GFN2-xTB we generated energy-minimized models of the diastereomers of this cage that further corroborated the results from analytical findings.
para-Ethynyl aniline as a building block for fully π-conjugated ligands and acetylide complexes: Crystal structures of trans-[Pt(PPh3)2(C≡CC6H4NH2)2] and [(μ-H)Ru3(CO)9(μ3-C≡CC6H4NH2)]
Deeming, Antony J.,Hogarth, Graeme,Lee, Mo-Yin,Saha, Malini,Redmond, Simon P.,Phetmung, Hirihattaya,Orpen
, p. 109 - 122 (2008/10/08)
para-Ethynyl aniline has been prepared, structurally characterised and investigated as a building block towards fully π-conjugated multifunctional ligands and complexes. Palladium-copper catalysed coupling with aryl halides affords a number of new amino-substituted aryl acetylenes, while using [Ni(CO)2(PPh3)2] as a catalyst, cyclotrimerisation and dimerisation to give an ene-yne were competitive. Reaction of para-ethynyl aniline with low-valent metal centres affords acetylide complexes trans-[Pt(PR3)2(C≡CC6H4NH2)2] (R = Ph, Bu(n)), cis-[Pt(η2-dppe)(C≡CC6H4NH2)2], all trans-[Ru(CO)2(PEt3)2(C≡CC6H4NH2)2] and [(μ-H)Ru3(CO)9(μ3C≡CC6H4NH2)]. The bis(acetylide) trans-[Pt(PPh3)2(C≡CC6H4NH2)2] has been used to prepare extended chain complexes with amide, imine, imino-phosphorane and ferrocenyl imine units being generated. Attempts to prepare polymers via reaction with terephthaloyl chloride lead only to the formation of oligomers with an average of four monomer units. (C) 2000 Elsevier Science B.V.
