Hans-Christian Böttcher  Marion Graf  Peter Mayer 《无机化学与普通化学杂志》2020,646(17):1432-1436

The reaction of equimolar amounts of [Co(CO)₃(NO)] and [PPN]CN, PPN⁺ = (PPh₃)₂N⁺, in THF at room temperature resulted in ligand substitution of a carbonyl towards the cyanido ligand presumably affording the complex salt PPN[Co(CO)₂(NO)(CN)] as a reactive intermediate species which could not be isolated. Applying the synthetic protocol using the nitrosyl carbonyl in excess, the title reaction afforded unexpectedly the novel complex salt PPN[Co₂(μ-CN)(CO)₄(NO)₂] ( 1 ) in high yield. Because of many disorder phenomena in crystals of 1 the corresponding NBu₄⁺ salt of 1 has been prepared and the molecular structure of the dinuclear metal core in NnBu₄[Co₂(μ-CN)(CO)₄(NO)₂] ( 2 ) was determined by X-ray crystal diffraction in a more satisfactory manner. In contrast to the former result, the reaction of [PPN]SCN with [Co(CO)₃(NO)] yielded the mononuclear complex salt PPN[Co(CO)₂(NO)(SCN-κN)] ( 3 ) in good yield whose molecular structure in the solid was even determined and its composition additionally confirmed by spectroscopic means.  相似文献   

    

Prof. Dr. Hans-Christian Böttcher  Dr. Marion Graf  Dr. Peter Mayer  Prof. Dr. Manfred Scheer 《ChemistryOpen》2020,9(10):991-995

The synthesis of [Rh₂(η⁵-Cp)₂(μ-H)(μ-PPh₂)₂]BF₄ ( 2 ) by protonation reaction of the metal basic complex [Rh₂(η⁵-Cp)₂(μ-PPh₂)₂] ( 1 ) with tetrafluoroboric acid in diethyl ether is described. Complex salt 2 was obtained in high yield and fully characterized by spectroscopic means and X-ray crystal diffraction. Applying the isolobal analogy between H and the fragment Au(PPh₃) as a synthetic strategy on the reaction of compound 2 with equimolar amounts of [Au(CH₃)(PPh₃)] in refluxing acetone resulted in the formation of the expected triangular cluster compound [Rh₂{μ-Au(PPh₃)}(η⁵-Cp)₂(μ-PPh₂)₂]BF₄ ( 3 ) in good yield. Metal cluster salt 3 was fully characterized by spectroscopic data and its molecular structure in the crystal was determined by X-ray diffraction. The structural comparison of the protonated dirhodium core in the cationic complex of 2 with the Rh₂Au framework in 3 is in good accordance with the isolobal relation between H⁺ and Au⁺ because they share the respective same position in these closely related molecular structures.  相似文献   

    

Christian Böhning;Hans-Christian Graf von Bothmer;Yuri Tschinkel; 《Mathematische Nachrichten》2024,297(11):4333-4355

We investigate equivariant birational geometry of rational surfaces and threefolds from the perspective of derived categories.  相似文献