Access to the new complex [TpCr(CN)3]- enables isolation of two metastable linkage isomers of a face-centered cubic cluster, [Tp8(H2O)6Cu6Cr8(CN)24]4+, both exhibiting an S=15 ground state.

Density Functional theoretical calculations confirm the experimental observation that the low-temperature photolysis of (TPP)Fe(NO)(NO2) (as a KBr pellet) results in the generation of linkage isomers involving the axial NO and NO2 groups and suggest the possible formation of the double linkage isomer (TPP)Fe(ON)(ONO). The energy difference between the ground state (porphine)Fe(NO)(NO2) and the ...

High-performance anion-exchange (HPAE) chromatography under alkaline conditions (pH congruent to 13) has been found to efficiently separate neutral oligosaccharides (triose to undecaose) according to molecular size, sugar composition, and linkage of monosaccharide units. The method was able to resolve 1----3, 1----4, and 1----6 positional isomers of neutral oligosaccharides, which are defined a...

Chemical separation has great importance in industrial applications. Separation of xylene isomers still prevails to be one of the most important challenges in chemical industry, due to the large amount of commercial use of p-xylene in the production of beverage bottles, fibers and films. A novel Zn(II)-based dynamic coordination framework based on flexible ether-linkage, exhibiting selective ad...

Electronic structure calculations employing density functional theory (DFT) and time-dependent density functional theory (TD-DFT) have been carried out on the model complexes {[(HCO2)3M2]2(mu-O2CCO2)}0/+(M=Mo or W) in D2h symmetry, where the oxalate bridge forms either five- or six-membered rings with the M(2) centres; the complexes are hereafter referred to as mu(5,5)0/+ and mu(6,6)0/+, respec...