12033-60-2Relevant articles and documents
HNSi; ν1 emission band by high resolution Fourier transform spectroscopy
Elhanine, M.,Farrenq, R.,Guelachvili, G.
, p. 2529 - 2531 (1991)
The emission spectrum of the fundamental vibration-rotation ν1 band (NH stretch) of iminosilicon HNSi has been observed near 2.7μm by high resolution Fourier transform spectroscopy from a mixture of N2 + SiH4 excited in a radio frequency discharge.This is the first spectroscopic observation of this molecule in the gas phase.Molecular constants ?, B, D, H are reported.Calculated microwave transitions which should be helpful for the investigation and the possible identification of HNSi in astrophysical sources are also given.
Reactions of atomic silicon and germanium with ammonia: A matrix-isolation FTIR and theoretical study
Chen, Mohua,Zheng, Aihua,Lu, Hao,Zhou, Mingfei
, p. 3077 - 3083 (2002)
The reactions of Si atoms with NH3 molecules have been studied using matrix-isolation FTIR spectroscopy and density functional theoretical calculations. Silicon atoms reacted with NH3 to form the SiNH3 complex spontaneousl
Gas-Phase Reactions of Si+ with Ammonia and the Amines (CH3)xNH3-x (x-1-3): Possible Ion-Molecule Reaction Pathways toward SiH, SiCH, SiNH, SiCH3, SiNCH3, and H2SiNH
Wlodek, S.,Bohme, D.K.
, p. 2396 - 2399 (1988)
Rate constants and product distributions have been determined for gas-phase Si+(2P) ions with ammonia and the amines (CH3)xNH3-x (x=1-3) at 296+/-2 K with the selected-ion flow tube technique.All reactions were observed to be fast and can be understood in terms of Si+ insertion into N-H and C-N bonds to form ions of the type SiNR1R2+ (R1, R2 = H, CH3) proceeding in competition (in the case of the amines) with hydride ion transfer to form immonium ions of the type CH2NR1R2+ (R1, R2 =H, CH3).C-N bond insert ion appears more efficient than N-H bond insertion.The contribution if hydride ion transfer increases with increasing stability of the immonium ion.The latter reaction leads directly to SiH as a neutral product.Other minor reaction channels were seen which lead directly or indirectly to SiCH and SiCH3.Rapid secondary proton transfer reactions were observed for SiNH2+ and SiNHCH3+ to produce gas-phase SiNH and SiNCH3 molecules.With methylamine SiNH2+ also appears to produce H2SiNH2+ which may deprotonate to form the simplest silanimine, H2SiNH, or aminosilylene, HSiNH2.Reactions of this type are of interest in molecular synthesis and here are proposed to contribute to the formation of SiH, SiCH, SiNH, SiCH3, SiNCH3, and H2SiNH or HSiNH2 in partially ionized interstellar gas clouds containing silicon, ammonia, and methylamines.
The microwave spectrum of the SiN(2Σ+) radical
Saito, Shuji,Endo, Yasuki,Hirota, Eizi
, p. 6447 - 6450 (1983)
The microwave absorption spectrum of the SiN radical has been detected in a dc glow discharge in a SiCl4 or SiH4/N2 mixture.The three rotational transitions N = 2a source-frequency modulation microwave spectrometer.The rotational constant, the centrifugal distortion constant, the spin-rotation coupling constant, and the magnetic hyperfine coupling constants b and c and the electric quadrupole coupling constant of the nitrogen nucleus have been precisely determined.The electronic structure of the SiN molecule has been briefly discussed using the magnetic hyperfine coupling constants and also the quadrupole coupling constant of 14N.
Theoretical and experimental studies of the flash pyrolysis of trimethylsilyl azide and trimethylgermyl azide: Generation and He I photoelectron spectra of iminosilylene and iminogermylene
Guimon, Claude,Pfister-Guillouzo, Geneviève
, p. 1387 - 1392 (1987)
The generation and the detection of iminosilylene and its germanium analogue from trimethylsilyl (and germyl) azide by gas-phase flash pyrolysis (1100 K, 10-2 mbar) are described. The ab initio study of molecular rearrangements of the (CH3
Gas-Phase Chemistry of HSiS- and HSiNH-: Ions Related to Silathioformaldehyde and the Silaazomethine of Formaldehyde
Damrauer, Robert,Krempp, Michele,O'Hair, Richard A. J.
, p. 1998 - 2005 (2007/10/02)
Anions related to silathioformaldehyde (H2Si=Si) and the silaazomethine of formaldehyde (H2Si=NH) have been prepared and studied using flowing afterglow selected ion flow tube techniques.The connectivities of these anions are shown in experimental studies to be - and -.In addition, ab initio computational studies demonstrate that these are the most stable anion isomers.These anions are prepared by both collisionally-induced dissociation and direct source reactions.The anions resulting from the later preparations have been submitted to reaction chemistry studies with CO2, COS, CS2, SO2, O2, and C6F6.Comparisons with earlier studies of HSiO- are made in terms of a simple mechanistic picture.
Hetero ?-Systems, 17. - Aminosilylene (Aminosilanediyl)
Maier, Guenter,Glatthaar, Joerg,Reisenauer, Hans Peter
, p. 2403 - 2406 (2007/10/02)
Aminosilylene can be prepared by 254-nm photolysis of silyl azide isolated in an argon matrix at 12 K.Subsequent irradiation with wavelenghts > 300 nm yields silaisonitrile (3) and molecular hydrogen.This reaction may be reversed with 254-nm light. - Key Words: Hydrogen capture / Matrix isolation / Photochemistry / Aminosilylene
