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Ethynyl- and allenylphosphine-boranes have been prepared by addition at low temperature of borane on the free phosphine. Purification was performed by selective trapping in vacuo and the complexes were characterized by NMR and infrared spectroscopy and mass spectrometry. A kinetic stability lower than that of the corresponding free systems was observed. A(More)
This work presents a real three-dimensional (3D) solution of the scalar Helmholtz-equation for VCSELs with finite volume method (FVM). The advantage of this formulation is that the order and structure of the system matrix can be reduced compared to vectorial finite element approach, and thus the feasible problem size can be significantly increased.(More)
Four different mechanisms and the effect of bulky groups were studied in the reaction of ({HC[CMeN(R)]2}Si, R = 2,6-diisopropylphenyl) with white phosphorus. The carefully tested B3LYP-D, ωB97X-D, and SOS-MP2 methods, by the CCSD(T) method, with cc-pVTZ basis set provided consonant results which support the reliability of our results and the applicability(More)
A self-consistently coupled three-dimensional dynamical model is presented for non-circular vertical-cavity surface-emitting lasers. The electric, thermal and optical processes are simulated using the finite volume method formulation adopted on a unified mesh consisting prism elements. Spatially distributed noise sources are incorporated into the(More)
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