Application of photoelectron spectroscopy to molecular properties, 55 - Low-coordinate arsenic chemistry: Studies of amino(iminoarsanes) using UV photoelectron spectroscopy and density functional theory

In this paper, we report the gas-phase characterization of two differently substituted amino(iminoarsanes), TmpAs=NSiMe3 and (SiMe(2)tBu)(2)NAs=N(SiMe (2)tBu), by coupling flash vacuum thermolysis (FVT) with UV photoelectron s pectroscopy (PES). Quantum chemical calculations, using the DFT method (B3L YP) with the basis set 6-311G(d,p), have also been carried out on the R1As= NR2 unit with R-1 = H, NH2, N(CH3)(2), N(SiH3)(2) and R-2 = H, SiH3, in ord er to study the effect of substitution on the electronic properties and the thermodynamic stability of the As=N skeleton. Similarities with phosphorus analogues are also discussed.