Synthesis, Structure and Catalytic Properties of Dinuclear Mo-VI Complexes with Ditopic Diaminotetraphenols

MoVI complexes with novel ditopic diaminotetraphenol ligands have been prepared by using a one-pot procedure in methanol or DMSO with [MoO2(acac)2] (acac = acetylacetonate) as the molybdenum source. The complexes were characterised with X-ray diffraction, NMR spectroscopic studies, elemental analysis and IR spectroscopy. In the solid state, the compounds represent either a rodlike molecular or oxido-bridged polymeric structure. The catalytic activity of the complexes was investigated by oxidising benzyl alcohol and 1-phenylethanol with hydrogen peroxide to the corresponding aldehyde and ketone, respectively. Furthermore, the catalytic activity was surveyed also in epoxidation of cyclooctene.

Aminobis- ja diaminotetrafenolien syntetisointi ja käyttö kahden- ja kolmenarvoisten metallikationien kompleksoinnissa

Syntheses and Structural Study of Novel Tetranuclear Bis(phenoxido)‐Bridged Cu II Metal–Organic Macrocycles

Six new tetranuclear copper(II) complexes were prepared exploiting novel ditopic alkylenediamine-N,N,N′,N′-tetraphenolate ligands. The geometrical parameters of the compounds can be varied by introducing different solvents of crystallization into the lattice. The structures of all six complexes were determined from single-crystal X-ray diffraction analyses and the magnetic properties of the complexes were estimated by computational DFT calculations. The relationship between the magnetic exchange coupling constant (J) and the Cu–O–Cu angle (θ) in these bis(phenoxido)-bridged complexes was investigated and a magnetostructural correlation was established between J and the θ angle. All studied …

Uranyl Complexes of Alkyl-Bridged Ditopic Diaminotetraphenol Ligands and Their Use as Uranyl Ion Extractors

The coordination chemistry of uranyl ions was studied using long n-alkyl chain (n = 5-8) bridged by N,N,N',N'-tetrakis(2-hydroxy-3-methyl-5-tert-butylbenzyl)diaminoalkanes (H4L1-H4L4) as ligands. All ligands formed 2:1 (U-to-L ratio) complexes with uranyl ions, but in addition 1:1 complexes could be characterized using ligands H4L2 and H4L3. The complexes were characterized by elemental analysis, spectroscopy (IR and NMR), and X-ray diffraction. The 2:1 complexes are of two types: [(UO2)2(H2Lm)(NO3)2(solvent)2] (m = 1 and 2; solvent = ethanol or propanol) or (cation)2[(UO2)2(H2Lm)(NO3)2(anion)2]·xsolvent (m = 2 and 4; cation = triethylammonium, anion = nitrate or thiocyanate, and solvent = …

Alkyl and diether bridged N,N,N′,N′-tetra(2-hydroxybenzyl)diamines: effects of hydrogen bonding on structure and solubility

A solvent-free one-step method has been used to prepare two N,N,N′,N′-tetra(2-hydroxy-3,5-dimethylbenzyl)diaminoalkanes containing a long n-alkyl bridge (6 and 8 CH2 groups between N-atoms). In addition, three novel N,N,N′,N′-tetra(2-hydroxy-5-alkyl-3-alkylbenzyl)-diaminoalkane-ethers (alkyl = methyl or t-butyl) have been prepared using the same method. The compounds were studied in the solid state using single crystal X-ray diffraction and their solubility was studied using UV/Vis spectroscopy. In the solid state, hydrogen bonding plays a key role in controlling the crystal packing and conformations of the molecules, thus affecting the solubility and properties of the compounds.

One-Pot Three-Component Solvent-Free Syntheses of n-Alkyl-Bridged N,N,N,N-tetra(2-hydroxybenzyl)diamines and N,N-bis(2-hydroxybenzyl) amines

A simple solvent-free method to prepare four N,N,N’,N’-tetra(2-hydroxy-3,5dimethylbenzyl)diaminoalkanes and four N,N,N’,N’-tetra(2-hydroxy-5-t-butyl-3-methylbenzyl)-diaminoalkanes containing a long n-alkyl-bridge (58 CH2 groups between N-atoms) is described. In addition, preparations of four dihydrochlorides of prepared n-alkyl-bridged N,N,N’,N’-tetra(2-hydroxybenzyl)diamines are described. This method was also tested in the preparation of eight previously reported N,N-bis(2-hydroxybenzyl)amine derivatives.

Syntheses, characterization and properties of Cu(II)-, Mo(VI)- and U(VI) complexes with diaminotetraphenolate ligands

CCDC 888654: Experimental Crystal Structure Determination

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CCDC 929057: Experimental Crystal Structure Determination

Related Article: Antti Riisiö, Ari Väisänen, and Reijo Sillanpää|2013|Inorg.Chem.|52|8591|doi:10.1021/ic400663y

CCDC 888653: Experimental Crystal Structure Determination

Related Article: Antti Riisiö, Mikko M. Hänninen, Reijo Sillanpää|2012|CrystEngComm|14|7258|doi:10.1039/c2ce26027a

CCDC 929056: Experimental Crystal Structure Determination

Related Article: Antti Riisiö, Ari Väisänen, and Reijo Sillanpää|2013|Inorg.Chem.|52|8591|doi:10.1021/ic400663y

CCDC 929058: Experimental Crystal Structure Determination

Related Article: Antti Riisiö, Ari Väisänen, and Reijo Sillanpää|2013|Inorg.Chem.|52|8591|doi:10.1021/ic400663y

CCDC 888651: Experimental Crystal Structure Determination

Related Article: Antti Riisiö, Mikko M. Hänninen, Reijo Sillanpää|2012|CrystEngComm|14|7258|doi:10.1039/c2ce26027a

CCDC 888652: Experimental Crystal Structure Determination

Related Article: Antti Riisiö, Mikko M. Hänninen, Reijo Sillanpää|2012|CrystEngComm|14|7258|doi:10.1039/c2ce26027a

CCDC 929054: Experimental Crystal Structure Determination

Related Article: Antti Riisiö, Ari Väisänen, and Reijo Sillanpää|2013|Inorg.Chem.|52|8591|doi:10.1021/ic400663y

CCDC 888655: Experimental Crystal Structure Determination

Related Article: Antti Riisiö, Mikko M. Hänninen, Reijo Sillanpää|2012|CrystEngComm|14|7258|doi:10.1039/c2ce26027a

CCDC 929055: Experimental Crystal Structure Determination

Related Article: Antti Riisiö, Ari Väisänen, and Reijo Sillanpää|2013|Inorg.Chem.|52|8591|doi:10.1021/ic400663y

CCDC 929053: Experimental Crystal Structure Determination

Related Article: Antti Riisiö, Ari Väisänen, and Reijo Sillanpää|2013|Inorg.Chem.|52|8591|doi:10.1021/ic400663y