chlorohydridobis(bis-1,2-(diphenylphosphino)ethane)iron(II) on:
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Chlorobis(dppe)iron hydride is a
In the course of this conversion, high-spin complex FeCl2(dppe)2 converts to low-spin HFeCl(dppe)2.
The complex HFeCl dppe)2_exhibits_a_number_of_reactions_associated_with_the_remaining_Fe-Cl_bond._Reaction_of_the_complex_with_sodium_borohydride_gives_the_dihydride_complex:
:HFeCl(dppe)2__+__NaBH4___→___H2Fe(dppe)2__+__NaCl__+__"BH3"
Removal_of_chloride_using_sodium_tetrafluorborate_under_and_atmostphere_of_hydrogen_or_nitrogen_gives_the_dinitrogen_complex.html" ;"title="sodium_borohydride.html" ;"title="dppe)2 exhibits a number of reactions associated with the remaining Fe-Cl bond. Reaction of the complex with sodium borohydride">dppe)2 exhibits a number of reactions associated with the remaining Fe-Cl bond. Reaction of the complex with sodium borohydride gives the dihydride complex:
:HFeCl(dppe)2 + NaBH4 → H2Fe(dppe)2 + NaCl + "BH3"
Removal of chloride using sodium tetrafluorborate under and atmostphere of hydrogen or nitrogen gives the dinitrogen complex">dinitrogen and dihydrogen complexes:{{cite journal, authors=Bautista, M. T., Bynum, L. D., Schauer, C. K., title=Synthesis of η2-Dihydrogen Complex, ''trans''-{ Fe(η2-H2)(H)[1,2-bis(diphenylphosphino)ethane]2} [BF4]: An Experiment for an Advanced Inorganic Chemistry Laboratory Involving Synthesis and NMR Properties of an η2-H2 Complex, journal=Journal of Chemical Education, year=1996, volume=73, issue=10 , pages=988–991, doi=10.1021/ed073p988
:HFeCl(dppe)2 + NaBF4 + N2 → Fe(N2)(dppe)2F4 + NaCl
:HFeCl(dppe)2 + NaBF4 + H2 → Fe(H2)(dppe)2F4 + NaCl
coordination complex
A coordination complex consists of a central atom or ion, which is usually metallic and is called the ''coordination centre'', and a surrounding array of bound molecules or ions, that are in turn known as ''ligands'' or complexing agents. Many ...
with the formula HFeCl(dppe)2, where dppe is the bidentate ligand 1,2-bis(diphenylphosphino)ethane. It is a red-violet solid. The compound has attracted much attention as a precursor to dihydrogen complexes.
Structure
The complex exhibitsoctahedral molecular geometry
In chemistry, octahedral molecular geometry, also called square bipyramidal, describes the shape of compounds with six atoms or groups of atoms or ligands symmetrically arranged around a central atom, defining the vertices of an octahedron. The oc ...
. The chloride and hydride ligands are mutually trans. The bond distances between the iron metal atom and the coordinating ligands are given by the following:
Synthesis and reactions
The compound is synthesized according to the following idealized reaction: :FeCl2 + 2 dppe + Na H4→ NaCl + ½ B2H6 + HFeCl(dppe)2
In the course of this conversion, high-spin complex FeCl2(dppe)2 converts to low-spin HFeCl(dppe)2.
The complex HFeCl dppe)2_exhibits_a_number_of_reactions_associated_with_the_remaining_Fe-Cl_bond._Reaction_of_the_complex_with_sodium_borohydride_gives_the_dihydride_complex:
:HFeCl(dppe)2__+__NaBH4___→___H2Fe(dppe)2__+__NaCl__+__"BH3"
Removal_of_chloride_using_sodium_tetrafluorborate_under_and_atmostphere_of_hydrogen_or_nitrogen_gives_the_dinitrogen_complex.html" ;"title="sodium_borohydride.html" ;"title="dppe)2 exhibits a number of reactions associated with the remaining Fe-Cl bond. Reaction of the complex with sodium borohydride">dppe)2 exhibits a number of reactions associated with the remaining Fe-Cl bond. Reaction of the complex with sodium borohydride gives the dihydride complex:
:HFeCl(dppe)2 + NaBH4 → H2Fe(dppe)2 + NaCl + "BH3"
Removal of chloride using sodium tetrafluorborate under and atmostphere of hydrogen or nitrogen gives the dinitrogen complex">dinitrogen and dihydrogen complexes:{{cite journal, authors=Bautista, M. T., Bynum, L. D., Schauer, C. K., title=Synthesis of η2-Dihydrogen Complex, ''trans''-References