527672-96-4

Upstream product

• 505-66-8 1,4-Diazacycloheptane 
• 50-00-0 formaldehyd 
• 96-76-4 2,4-di-tert-Butylphenol 

Downstream Products

• 1397696-33-1 Al(C₅H₁₀N₂(CH₂C₆H₂(C(CH₃)3)2O)2)(OCH₂C₆H₅) 

Relevant academic research and scientific papers

Synthesis, structure, DFT study and catechol oxidase activity of Cu(II) complex with sterically constrained phenol based ligand

A mononuclear Cu(II) complex [CuII(L)](1) [H2L=N,N′-bis(2-hydroxy-3,5-di tertiarybutylbenzyl)-homopiperazine] has been synthesized by using sterically constrained tetradentate phenol-based ligand. Characterization of this compound ha

Ring-opening polymerization of rac-lactide mediated by tetrametallic lithium and sodium diamino-bis(phenolate) complexes

Lithium and sodium compounds supported by tetradentate amino-bis(phenolato) ligands, [Li2(N2O2BuBuPip)] (1), [Na2(N2O2BuBuPip)] (2) (where [N2O2

Synthesis and characterization of rare-earth metal guanidinates stabilized by amine-bridged bis(phenolate) ligands and their application in the controlled polymerization of rac-lactide and rac-β-butyrolactone

Eight rare-earth metal guanidinates supported by a versatile family of chelating amine-bridged bis(phenolate) ligands were synthesized. Metathesis reactions of rare-earth metal chlorides [LnClL1(THF)] stabilized by amine-bridged bis(phenolate)

Tuning the olefin epoxidation by manganese(iii) complexes of bisphenolate ligands: Effect of Lewis basicity of ligands on reactivity

A new family of manganese(iii) complexes of the type [Mn(L)Cl], where H2L is 1,4-bis(2-hydroxy-benzyl)-1,4-diazepane (H2(L1)), 1,4-bis(2-hydroxy-4-methylbenzyl)-1,4-diazepane (H2(L2)), 1,4-bis(2-hydroxy-3,5-dimethylbenzyl)-1,4-diazepane (H2(L3)) and 1,4-bis(2-hydroxy-3,5-di-tert-butylbenzyl)-1,4-diazepane (H2(L4)), has been isolated and studied as a catalyst for epoxidation reaction. Complexes 1-4 have been characterized using elemental analysis, electronic spectral and electrochemical methods and ESI-MS. The single crystal X-ray structures of 1 and 3 contain the MnN2O2Cl chromophore with a novel square pyramidal coordination geometry (τ: 1, 0.11; 3, 0.00). All the complexes possess a distorted square pyramidal coordination geometry in solution, as revealed by the characteristic bands observed in the electronic spectra. A time dependent density functional theory (TD-DFT) calculation has been performed to assist in the assignment of the electronic absorption spectral bands of the complexes. The Mn(iii)/Mn(ii) redox potentials (E1/2) of 1-4 fall within the narrow range of 0.279-0.320 V. The catalytic ability of the complexes towards olefin epoxidation has been investigated using PhIO as the oxygen source at room temperature under an N2 atmosphere. Addition of N-methylimidazole to the reaction mixture leads to an increase in the epoxide yield. A correlation between the Lewis acidity of the Mn(iii) center as tuned by the substituents on the phenolate ligand, and the epoxide yield and product selectivity has been observed. The present complexes act as better chemoselective catalysts for epoxidation of cyclohexene and styrene rather than cyclooctene.

Crystallographic characterisation of Ti(iv) piperazine complexes and their exploitation for the ring opening polymerisation of rac-lactide

In this paper a series of eight Ti(iv) piperazine based complexes have been prepared and fully characterised in the solid-state by X-ray crystallography and in solution via NMR spectroscopy. In the solid-state either Ti 2(L)(OiPr)su

Homopiperazine and piperazine complexes of ZrIV and Hf IV and their application to the ring-opening polymerisation of lactide

In this paper we describe the preparation and characterisation, by single-crystal X-ray diffraction, of twelve ZrIV/HfIV complexes based on piperazine or homopiperazine salan ligands. With the piperazine ligands, a mixture of species

Mechanistic insight into the reactivity of oxotransferases by novel asymmetric dioxomolybdenum(VI) model complexes

The asymmetric molybdenum(VI) dioxo complexes of the bis(phenolate) ligands 1,4-bis(2-hydroxybenzyl)-1,4-diazepane, 1,4-bis(2-hydroxy-4-methylbenzyl)-1,4- diazepane, 1,4-bis(2-hydroxy-3,5-dimethylbenzyl)-1,4-diazepane, 1,4-bis(2-hydroxy-3,5-di-tert-butylbenzyl)-1,4-diazepane, 1,4-bis(2-hydroxy-4- flurobenzyl)-1,4-diazepane, and 1,4-bis(2-hydroxy-4-chlorobenzyl)-1,4-diazepane (H2(L1)-H2(L6), respectively) have been isolated and studied as functional models for molybdenum oxotransferase enzymes. These complexes have been characterized as asymmetric complexes of type [MoO 2(L)] 1-6 by using NMR spectroscopy, mass spectrometry, elemental analysis, and electrochemical methods. The molecular structures of [MoO 2(L)] 1-4 have been successfully determined by single-crystal X-ray diffraction analyses, which show them to exhibit a distorted octahedral coordination geometry around molybdenum(VI) in an asymmetrical cis-β configuration. The Mo-Ooxo bond lengths differ only by ≈0.01 A. Complexes 1, 2, 5, and 6 exhibit two successive MoVI/Mo V (E1/2, -1.141 to -1.848V) and MoV/Mo IV (E1/2, -1.531 to -2.114V) redox processes. However, only the MoVI/MoV redox couple was observed for 3 and 4, suggesting that the subsequent reduction of the molybdenum(V) species is difficult. Complexes 1, 2, 5, and 6 elicit efficient catalytic oxygen-atom transfer (OAT) from dimethylsulfoxide (DMSO) to PMe3 at 65°C at a significantly faster rate than the symmetric molybdenum(VI) complexes of the analogous linear bis(phenolate) ligands known so far to exhibit OAT reactions at a higher temperature (130°C). However, complexes 3 and 4 fail to perform the OAT reaction from DMSO to PMe3 at 65°C. DFT/B3LYP calculations on the OAT mechanism reveal a strong trans effect.