Trimeric perfluoro-ortho-phenylene mercury(II) cluster is a prototypical example of a macrocyclic multidentate Lewis acid. In this study we report the electronic structure, the calculated absorption and vibrational spectra via all-electron scalar and spin-orbit relativistic DFT calculations for [Hg(o-C6H4)]3 (1), [Hg(o-C6F4)]3 (2), and the dimeric form of 2, ([Hg(o-C6F4)]3)2 (3). Due to the inclusion of the spin-orbit interaction, double point groups were used (D3h* and D3d*). The calculations suggest small paratropic ring currents at the center of 1 and being smaller for 2 due to the withdrawn properties of the perfluorated ligand. The luminescent properties of the solid state of 2 are well represented by the postulated model of dimer 3, which mimic the solid state, where the proposed mechanism involves a vibronically coupled emission process. The calculated lambda(absorption)max of 3 show an intense peak at 347 nm, which compares well with the reported band at 355 nm; also, the calculated lambda(emission)= 431 nm is close to the experimental value of 440 nm. Moreover, the calculated structural changes of the first excited state (3*) are reflected in the large value of the calculated Stoke shifts of 84 nm, which is in quite good agreement with the value of 85 nm extracted from the experimental data.

The monometallic complexes [Cp*M(2,(5b) were synthesized and characterized spectroscopically and in the case of complexes 1 and 5b by X-ray diffraction. C and103 Rh NMR spectroscopic studies suggest that the bonding mode of the rhodium center to the s-indacenediide ligand can be described as an inter-

Conjugated organic materials are the subject of intensive research for a range of optoelectronic applications. A model for such molecules is fluorene, which consists of rigid planar biphenyl units of C 2v symmetry. A low energy experimental absorption spectrum in the gas phase is composed of A 1 and B 2 transitions. The aim of this work is to evaluate the performance of the basis sets cc-pVXZ (X ¼ D and T)

In this article, we simulated the collisions of an OH• projectile impacting on a methanol cluster formed by ten units of methanol to mimic an ice mantle (CH3OH)10. The chemical processes occurring after the impact were studied through Born-Oppenheimer (ab-initio) molecular dynamics. We focus on collisions with initial kinetic impact energy of 10–22 eV, where the richest chemistry happens. We report the formation mechanisms of stable complex organic molecules (COMs) such as methoxymethanol CH3OCH2OH, formic acid HCOOH, formyl radical HCO, formaldehyde H2CO and its elusive HCOH isomer. We show that CH2(OH)2, •CH2OH or +CH2OH are key intermediates to generate H2CO and other COMs. We compare the outcomes using OH• with those using OH− projectiles. These processes are likely relevant to the production of COMs in astrophysical environments. We discuss its formation mechanism and the astrophysical implications of these chemical pathways in star-forming regions.

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