![]() ![]() Matrix isolation experiments give evidence for the formation of the loosely bonded metal-silane complex M.SiH(4) by the spontaneous reaction of Al or Ga atoms (M) with silane in a solid Ar matrix at 12 K however, Ga(2) appears to insert spontaneously into an Si-H bond to form HGaGaSiH(3), probably with the structure HGa(micro-SiH(3))Ga. ![]() The presence of trace metal carbonyls, nitrosyls and hydrides is also possible. The occurrence of some metals and semimetals (e.g., Al, Mg, Ga) as neutral hydroxides, suggested by other authors to occur in natural gases, is possibly confirmed. Those with the highest presence chance include cyanogen isocyanate, cyanogen N-oxide, (iso)cyanic acid, c-cyanomethanimine (ethylenediimine), isocyanatomethane, iodocyanoacetylene, acetonitrile, acetaldehyde, m-hydroxybenzonitrile (m-cyanophenol), isonitrosyl chloride, nitrosyl isocyanide, difluorosilane, pentacene, triphenylene, thiazolidine, cyclohexane, and a trinitrenetriazine. ![]() Besides the common gases, a number of trace gases is also determined based on residual FTIR spectra. AsH3 is mainly a trace gas but may locally be enriched. Fluorine is rarely present as HF, whereas SiF4 occurs more frequently and in much larger quantities. This is also true for S-rich and Cl-rich mineralization in connection with gases of SO2, H2S, OCS, CS2, thiophene, dimethyl sulfide, dimethyl disulfide, HCl, and various halogenated hydrocarbons. ![]() No evident dependence between the gas and mineral condensate compositions is found: N-rich condensates may but do not have to be associated with NH3-, pyridine-, or NOx-rich gases. One outstanding determination concerns GeCl4, found in most samples often in large quantities. The gas compositions are proved to be extremely variable, when comparing both different BCMH and flues or flue zones of the same heaps. Powder X-Ray Diffraction is applied for phase analysis to determine the species composition of mineral condensates present within and around gas flues. The other approach used is gas chromatography and indicatory tubes. Ī methodological approach to the complex geochemical analysis of the coal fire in burning coal mine heaps (BCMH) of Upper Silesian Coal Basin has been developed. CBrO carbonylsilene (shf) ZrCO B 2 O 2 Be 2 H 2 Cu(CO) 2 (shf) a transition metal carbonyl (Lin & Lee, n.d) (Lembke et al., 1977) (Coates & Meyers, 2000) 1890-1891 RDTSC-sA, RDTSC-o, RDT10A, RDT11, PSG5 ZnH 2 Cu(CO) 2 alane (AlH 3 ) NCCO radical Mo(CO) 2 VCO methyl-d-3-stannane? (obm) Si(CCD) 2 TiCO SbH 3 CH 3 GaH 2 ? (obm) H 2 GaPH? (obm) SiH 3 HgH (shf) a transition metal carbonyl (Shayesteh et al., 2004) (Zhou & Andrews, 1999a) (Schreiner et al., 2009) (Souter & Andrews, 1997) (Hanlan et al., 1976) (Shimanouchi, 1972) (Maier et al., 1998a) (Zhou & Andrews, 1999b) (Nakamoto, 2009) (Müller et al., 2000) (Himmel et al., 2001) (Legay-Sommaire & Legay, 1998) (Coates & Meyers, 2000) 1868-1870 RDTSC-s, PSG0, PSG1A c-(NO) 2 (a dimer) Mo(CO) 3 CO group in a 5-member-ring anhydride or transition metal carbonyl (Dinerman & Ewing, 1970) (Perutz & Turner, 1975) (Coates & Meyers, 2000) 1844-1843 RDT04A, RDT05, RDT05A Ag(CO) 2 SnH 3 nitrosyl fluoride isonitrosyl chloride cyc-C 8 ethynyl radical SiH 3 − CO group in an organic anhydride or transition metal carbonyl (McIntosh & Ozin, 1976) (Wang et al., 2002a) (Shimanouchi, 1972) (Hallou et al., 1998) (Wang et al., 1997) (Coates & Meyers, 2000) 1830 RDT04A, RDT05, RDT05A Ag(CO) 2 MoH 4 phosgene (shf) benzoylperoxy radical (obm) Mn(CO) 2 (shf) 2-propynylidyne CO group in an organic anhydride or transition metal carbonyl (McIntosh & Ozin, 1976) (Wang & Andrews, 2005f) (Shimanouchi, 1972) (Golec et al., 2011) Mn(CO) − nitrosyl iodide Fe(NO) 2 ? (shf) V(CO) − AlH 2 (obm) CO group in an acyl halide or in an organic anhydride or transition metal carbonyl (Feuerhahn et al., 1978) (Zhou & Andrews, 1999b) (Chertihin & Andrews, 1993) (Coates & Meyers, 2000) 1790-1791 RDTSC-s, RDTSC-b, RDTSCo-sm, RDTSCo-S, PSG0, PSG1A. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |