Hydride selenide

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Hydride selenides are mixed anion compounds containing both hydride and selenide ions. They are in the category of heteroanionic chalcogenides, or mixed anion compounds. Related compounds include the oxyhydrides, hydride sulfides, and hydride tellurides.

Formation

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Salt-like hydride selenides may be formed by heating selenium with a metal hydride in an oxygen-free capsule. For rare earth elements, this method works as long as selenium has enough oxidising power to convert a +2 oxidation state to a +3 state. So for europium and ytterbium it does not work as the monoselenide is more stable.[1]

One transition metal complex was formed from a lithium zirconium hydride complex in solution reacting with diphenylphosphine selenide.[2]

Properties

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With rare earth elements there are two structure depending on the size of the metal ions. The large atoms form a 2H hexagonal anti-nickel arsenide structure, with hydrogen inserted into tetrahedral positions. A 1H hexagonal structure is found in rare earth elements from gadolinium to lutetium, and yttrium.[3]

List

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formula system space group unit cell Å volume density comment reference
[η1-3,5-tBu2pz(η-Al)H)2Se] pz=pyrazolato monoclinic P21/n a=14.385 b=11.035 c=16.522 β=98.90° Z=6 2591.1 1.265 melt 272°C; colourless [4]
Sc2H2Se trigonal P3m1 a=3.5664 c=6.1166 [1]
YHSe hexagonal P63/m2 a=3.8333 c=3.8876 Z=1 5.64 black; water insensitive; insulator [1][5]
Y2H2Se trigonal P3m1 [1]
[(C5Me5)2ZrH]2(μ-Se) orthorhombic Ccc2 a=20.809 b=20.865 c=19.239 Z=8 8353 1.284 red / orange [2]
LaHSe hexagonal P63/mmc a=4.1151 c=8.0036 Z=2 bluish grey [1]
La2H2Se trigonal P3m1 a=4.1268 c=6.8733 [6]
La2H3Se trigonal P3m1 a=4.139 c=6.960 [6]
La2H4Se trigonal R3m a=4.0542 c=22.609 [6]
CeHSe hexagonal P63/mmc a = 4.0636 c = 7.9481 Z=2 bluish grey [1]
PrHSe hexagonal P63/mmc a=4.0223 c=7.9183 Z=2 bluish grey [1]
NdHSe hexagonal P63/mmc a=3.9874 c=7.8888 Z=2 bluish grey [1]
GdHSe hexagonal P63/m2 a=3.8802 c=3.9260 Z=1 bluish grey [1]
TbHSe hexagonal P63/m2 a=3.8517 c=3.9066 Z=1 bluish grey [1]
DyHSe hexagonal P63/m2 a=3.8348 c=3.8874 Z=1 bluish grey [1]
HoHSe hexagonal P63/m2 a = 3.8156 c = 3.8728 Z=1 bluish grey [1]
ErHSe hexagonal P63/m2 a=3.7874 c=3.8636 Z=1 bluish grey [1]
LuHSe hexagonal P63/m2 a=3.7474 c=3.8239 Z=1 bluish grey [1]

References

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  1. ^ a b c d e f g h i j k l m n Schleid, Thomas; Folchnandt, Matthias (March 1996). "MHSe: The First Hydride Selenides of the Lanthanides (M = La-Nd; Gd-Er, Lu)". Zeitschrift für anorganische und allgemeine Chemie. 622 (3): 455–461. doi:10.1002/zaac.19966220312. ISSN 0044-2313.
  2. ^ a b Hoskin, Aaron J.; Stephan, Douglas W. (1999-06-01). "Decamethylzirconocene-Chalcogenide-Hydride Complexes". Organometallics. 18 (13): 2479–2483. doi:10.1021/om990180p. ISSN 0276-7333.
  3. ^ Folchnandt, Matthias; Rudolph, Daniel; Hoslauer, Jean-Louis; Schleid, Thomas (26 June 2019). "The rare earth metal hydride tellurides RE HTe ( RE =Y, La–Nd, Gd–Er)". Zeitschrift für Naturforschung B. 74 (6): 513–518. doi:10.1515/znb-2019-0060.
  4. ^ Zheng, Wenjun; Mösch-Zanetti, Nadia C.; Roesky, Herbert W.; Noltemeyer, Mathias; Hewitt, Manuel; Schmidt, Hans-Georg; Schneider, Thomas R. (2000-12-01). "Alumoxane Hydride and Aluminum Chalcogenide Hydride Compounds with Pyrazolato Ligands". Angewandte Chemie (in German). 112 (23): 4446–4449. doi:10.1002/1521-3757(20001201)112:23<4446::AID-ANGE4446>3.0.CO;2-I.
  5. ^ Schleid, Thomas; Meyer, H.-Jürgen (November 1992). "Hydrogen-stabilized yttrium monoselenide". Journal of Alloys and Compounds. 189 (1): 75–82. doi:10.1016/0925-8388(92)90049-F.
  6. ^ a b c Pflug, Christian; Rudolph, Daniel; Schleid, Thomas; Kohlmann, Holger (2022-04-08). "Hydrogenation Reaction Pathways and Crystal Structures of La 2 H 2 Se, La 2 H 3 Se and La 2 H 4 Se". European Journal of Inorganic Chemistry. 2022 (10). doi:10.1002/ejic.202101095. ISSN 1434-1948.
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