Infrared spectra of aluminum hydrides in solid hydrogen: Al2H4 and Al2H6

Journal of the American Chemical Society
Xuefeng WangMario E Fajardo

Abstract

The reaction of laser-ablated Al atoms and normal-H(2) during co-deposition at 3.5 K produces AlH, AlH(2), and AlH(3) based on infrared spectra and the results of isotopic substitution (D(2), H(2) + D(2) mixtures, HD). Four new bands are assigned to Al(2)H(4) from annealing, photochemistry, and agreement with frequencies calculated using density functional theory. Ultraviolet photolysis markedly increases the yield of AlH(3) and seven new absorptions for Al(2)H(6) in the infrared spectrum of the solid hydrogen sample. These frequencies include terminal Al-H(2) and bridge Al-H-Al stretching and AlH(2) bending modes, which are accurately predicted by quantum chemical calculations for dibridged Al(2)H(6), a molecule isostructural with diborane. Annealing these samples to remove the H(2) matrix decreases the sharp AlH(3) and Al(2)H(6) absorptions and forms broad 1720 +/- 20 and 720 +/- 20 cm(-1) bands, which are due to solid (AlH(3))(n). Complementary experiments with thermal Al atoms and para-H(2) at 2.4 K give similar spectra and most product frequencies within 2 cm(-1). Although many volatile binary boron hydride compounds are known, binary aluminum hydride chemistry is limited to the polymeric (AlH(3))( solid. Our experimental ...Continue Reading

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Citations

Mar 24, 2007·Journal of Molecular Modeling·Wojciech Grochala
Mar 7, 2005·Physical Chemistry Chemical Physics : PCCP·Xuefeng Wang, Lester Andrews
Apr 27, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Anthony J DownsDerek A Wann
Mar 11, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Andreas Stasch, Cameron Jones
Mar 5, 2014·Chemical Communications : Chem Comm·David J WolstenholmeG Sean McGrady
Aug 7, 2009·The Journal of Chemical Physics·J G O OjwangWilliam A Goddard
Jul 5, 2013·The Journal of Chemical Physics·Daniel K W MokJohn M Dyke
Nov 16, 2010·The Journal of Chemical Physics·I PinoM C van Hemert
Jun 11, 2016·Chemical Reviews·Natalia V BelkovaElena S Shubina
Mar 3, 2007·Angewandte Chemie·Xuefeng Wang, Lester Andrews
Dec 6, 2008·Chemistry : a European Journal·Pekka Pyykkö, Michiko Atsumi
Sep 24, 2010·Nature Chemistry·Simon J BonyhadyAndreas Stasch
Jun 26, 2012·Chemistry : a European Journal·Peter SirschG Sean McGrady
Oct 22, 2019·Physical Chemistry Chemical Physics : PCCP·Meenakshi Joshi, Tapan K Ghanty
May 28, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Valerij Kuznetsov
Oct 7, 2020·Angewandte Chemie·Rosalyn L FalconerMichael J Cowley
Jul 13, 2006·The Journal of Physical Chemistry. a·Lester Andrews, Han-Gook Cho
Jan 29, 2010·The Journal of Physical Chemistry. a·Xuefeng Wang, Lester Andrews
Apr 17, 2012·The Journal of Physical Chemistry. a·Christopher P Nold, John D Head
Nov 27, 2019·The Journal of Physical Chemistry. a·Mario E Fajardo
Nov 27, 2019·The Journal of Physical Chemistry. a·Mario E Fajardo
Jun 28, 2011·Journal of the American Chemical Society·Katherine R CompaanHenry F Schaefer
Mar 21, 2018·Chemical Reviews·Terry Chu, Georgii I Nikonov
Feb 12, 2014·The Journal of Physical Chemistry. a·J D GrahamK H Bowen
Oct 25, 2011·The Journal of Physical Chemistry. a·Xuefeng Wang, Lester Andrews
Feb 1, 2005·Inorganic Chemistry·Xuefeng Wang, Lester Andrews
Jun 6, 2007·The Journal of Physical Chemistry. a·Xuefeng Wang, Lester Andrews
Aug 18, 2005·Journal of the American Chemical Society·Daniel J GoebbertPaul G Wenthold
Jul 3, 2007·The Journal of Physical Chemistry. a·Xuefeng Wang, Lester Andrews
Jul 13, 2006·The Journal of Physical Chemistry. a·Shan Xi Tian

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