an atom-efficient, eco-friendly, solvent-free, high yielding, multicomponent green strategy to synthesize triazolo[1,2-a]indazole-triones derivatives by the one-pot condensation of aldehyde, dimedone, and phenyl urazole is presented. a series of different substituted aromatic aldehydes including either electron-withdrawing or electron-donating groups used in this reaction participated well and ...

Redox-active organic dendrimers are of interest for a variety applications, e. g. as components in optoelectronic devices and energy-storage (battery) materials, were also used to model enzymatic reactivity. Here, we report the first synthesis redox-active dendrimer-like oligoguanidines, assembling six or twelve guanidino groups attached aromatic cores one molecule. The novel being strong elect...

The oxidation of [n]nickelocenophanes [Ni(?5-C5H4)2(CH2)3] (3), [Ni(?5-C5H4)2(SiMe2)2] (10), [Ni(?5-C5H4)2(SiMe2)2O] (11), [Ni(?5-C5H4)2(CH2)4] (12), and poly(nickelocenylpropylene) [Ni(?5-C5H4)2(CH2)3]n (4) to both the monocationic dicationic species was investigated in dichloromethane by cyclic voltammetry (CV) square-wave voltammetry. presence acetonitrile on potentials 3 also CV. 10–12 exhi...

A metal-induced self-assembly strategy is used to promote the π-dimerization of viologen-based radicals at room temperature and in standard concentration ranges. Discrete box-shaped 2:2 (M:L) macrocycles or coordination polymers are formed solution by a ditopic ligand with cis-[Pd(en)(NO3)2], trans-[Pd(CH3CN)2(Cl)2], [Pd(CH3CN)4(BF4)2]. Changing redox state bipyridium units involved tectons, fr...

The formation of a hitherto unknown three-coordinate dicationic hydrido boron complex is described. Interestingly, supporting ligand carbodicarbene gave unprecedented reaction with BH3 without using more highly electrophilic Lewis acid precursors. Spectroscopic, crystallographic, and computational analysis was performed to understand the electronic features of these species.

The photoisomerization behaviour of a dicationic azobenzene derivative on the inorganic surface was examined. The isomerization reaction was controlled by the charged array of the inorganic surface due to the "pinning effect" because of the electrostatic interaction between anionic charged sites on the inorganic surface and cationic charged sites in dye molecules.

A novel [2]catenane was synthesised by ring-closing metathesis from a Ca-bisphosphate template. The resulting interlocked structure features two chiral 1,1'-binaphthyl-phosphates, leading to a bifunctional catenane structure. Initial binding studies point at the applicability of such mechanically interlocked bisphosphates as artificial receptors for dicationic guest molecules.

Complexation of two types of dicationic bipyridium guests, paraquat derivatives and bis(N-mono-substituted bipyridine) cations, by a negatively charged carboxylato-biphen[3]arene (CBP3) in water is reported. CBP3 could strongly interact with these guests, where charge-transfer and electrostatic interactions play important roles.

A ruthenium benzylidene complex with a neutral bidentate N-heterocyclic carbene was prepared and evaluated in ring-closing metathesis of diallyl substrates. Reaction with AgPF6 to generate a four-coordinate complex produced an unexpected dicationic ruthenium benzyl degradation product through nucleophilic attack of the NHC ligand on the benzylidene carbon.