124774-76-1

Upstream product

• 624-31-7 4-tolyl iodide 
• 124774-74-9 para-ethynyl-(4,4,5,5-tetramethyl-4,5-dihydro-1H-3-(N-oxide)-imidazol-1-yloxyl)-phenyl 
• 10602-04-7 (4-ethynylphenyl)methanol 
• 3964-18-9 2,3-dimethyl-2,3-dinitrobutane 
• 138853-09-5 4-ethynylbenzaldehyde ethylene acetal 
• 14384-45-3 N,N'-dihydroxy-2,3-dimethylbutane-2,3-diamine 
• 127653-16-1 4,4'-(buta-1,3-diyne-1,4-diyl)dibenzaldehyde 
• 175203-59-5 4-[4-(hydroxymethyl)phenyl]-2-methylbut-3-yn-2-ol 
• 117569-57-0 4-(3-hydroxy-3-methylbut-1-ynyl)benzaldehyde 
• 1122-91-4 4-bromo-benzaldehyde 
• 63697-96-1 4-Ethynylbenzaldehyde 
• 124774-78-3 4-ethynyl-1-(1,3-dihydroxy-4,4,5,5-tetramethylimidazolin-2-yl)benzene 

Relevant academic research and scientific papers

Interacting networks of purely organic spin-1/2 dimers

In the present study we report the synthesis of some novel nitronyl nitroxide biradical systems 1-4c with various π-bridges between the radical centres. UV-Vis, IR, EPR and X-ray diffraction studies, along with MS and NMR data where appropriate, are described. Magnetic measurements revealed that the biradicals 1c, 3c and 4c exhibit a moderately strong antiferromagnetic intra-molecular exchange, whereas nitroxide 2c shows a significantly higher exchange coupling, which can only be explained by the presence of strong inter-molecular interactions. From DFT calculations performed on the basis of the X-ray crystal structure of compound 4c, a theoretical value of the intra-dimer coupling constant Jintra = -8.6 K is obtained. Direct proof also for inter-molecular arrangement with Jinter ～ -2 K was provided by the low temperature AC studies of biradical 4c. According to the magnetic characterization, the nitronyl biradical 4c is a promising candidate for a purely organic-based low-dimensional quantum magnet. This journal is the Partner Organisations 2014.

Cross-coupling of aryl iodides with paramagnetic terminal acetylenes derived from 4,4,5,5-tetramethyl-2-imidazoline-2-oxyl 3-oxide

2-(Arylylethynylphenyl)-4,4,5,5-tetramethyl-2-imidazoline-1-oxyl 3-oxides 12 and 13 were synthesized by cross-coupling of aryl iodides with 1-alkynes containing the 4,4,5,5-tetramethyl-2-imidazoline-1-oxyl 3-oxide fragment. A procedure was developed for the preparation of 3-and 4-ethynyibenzaldehydes with the use of 2-methylbut-3-yn-2-ol.