Electronic Spectrum of Silicon Monosulfide:  Configuration Interaction Study

Abstract

Ab initio based configuration interaction calculations using relativistic effective core potentials and compatible basis sets have been performed to study the electronic spectrum of the silicon monosulfide molecule. Potential energy curves of low-lying states of SiS have been computed. Spectroscopic properties of many observed states such as X

IR laser-induced co-decomposition of trisilane and thiirane for deposition of polycarbosilthiane films

“…In the dissociation of the 1:1 trisilane-thiirane mixture, a delay of 10.5 ms between the dissociating and the exciting laser pulses has been used and we have checked that there is still LIF signal when this delay is even longer than 500 ms. The lifetimes of the signals are around 105 ns, in total agreement with the values calculated by Chattopadhyaya et al [27]. The assignment was supported by using our high resolution system.…”

“…In this short interval a great number of rotational lines were detected that are assignable to the (n 00 = 1, n 0 = 10) and (n 00 = 0, n 0 = 8) vibrational bands of the E 1 S + -X 1 S + system of the SiS species [28,29]. In this case we have obtained lifetime values around 30 ns compatible with the lifetime values calculated for SiS in [27].…”

Electronic States and Spectroscopic Properties of SiTe and SiTe+

“…The state is denoted as b 3 Π in analogy to the lighter species for which the b 3 Π 1 -X 1 Σ + transition has been observed. [27][28][29] It is also expected that such transition may also be observable in SiTe. The b 3 Π state is generated mainly due to a σfπ* excitation.…”

{μ‐PbSe}: A Heavy CO Homologue as an Unexpected Ligand

“…Thep ublication of at otal of 43 reviews in Angewandte Chemie,41in Chemical Reviews,and more than 50 in Coordination Chemistry Reviews within the last decade reflects the huge diversity of syntheses and catalytic applications of carbon monoxide and its compounds.In contrast, apart from matrix isolation experiments, [1] the molecular and coordination chemistry of the heavier homologues of CO,t hus the neutral molecular tetrel monochalcogenides E 14 E 16 (E 14 = C…Pb;E 16 = O…Te), with (formally) divalent E 14 (II) atoms,isrestricted to complexes with carbon monochalcogenides CS,C Se,a nd CTe.[2a] Furthermore,S nO and PbO units were stabilized within pincer complexes using benzannulated bisstannylene ligands.[2b] All other examples were only discussed as intermediates in the context of spectroscopic [3][4][5][6] and/or theoretical studies, [4][5][6][7][8][9][10][11][12][13][14][15][16] such as molecular PbO which was obtained under single-atom-collision conditions from atomic Pb and O 3 . [17] Ther eason for the apparent difference between the chemistry of CO and that of its heavier homologues has been attributed to the distinctly lower bond strength of the corresponding "triple" bond with increasing atomic number, and therefore ah igher tendencyt owards aggregationultimately yielding the respective minerals,s uch as litharge and massicot in the case of PbO.…”