Chlorobis(dppe)iron hydride is a coordination complex 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.[1]
The complex exhibits octahedral molecular geometry. The chloride and hydride ligands are mutually trans.[2] The bond distances between the iron metal atom and the coordinating ligands are given by the following:
Bond
Bond distance
Fe-P1
2.238
Fe-P2
2.256
Fe-P3
2.236
Fe-P4
2.255
Fe-Cl
2.404
Fe-H
1.313
Synthesis and reactionsedit
The compound is synthesized according to the following idealized reaction:[3]
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 and dihydrogen complexes:[4]
^Morris RH (2008). "Dihydrogen, Dihydride and in Between: Nmr and Structural Properties of Iron Group Complexes". Coord. Chem. Rev. 2252 (21–22): 2381–2394. doi:10.1016/j.ccr.2008.01.010.
^Lee, J.; Jung, G.; Lee, S. W. Structure of trans-chlorohydridobis(diphenylphosphinoethane)iron(II). Bull. Korean. Chem. 1998, 19, 267. ISSN 0253-2964
^Giannoccaro, P.; Sacco, A. (1977). "Bis[Ethylenebis(Diphenylphosphine)]‐Hydridoiron Complexes". Inorganic Syntheses. Vol. 17. pp. 69–71. doi:10.1002/9780470132487.ch19. ISBN9780470132487. {{cite book}}: |journal= ignored (help)
^Bautista MT, Bynum LD, Schauer CK (1996). "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 of Chemical Education. 73 (10): 988–991. doi:10.1021/ed073p988.
January 01, 1970
chlorobis, dppe, iron, hydride, coordination, complex, with, formula, hfecl, dppe, where, dppe, bidentate, ligand, diphenylphosphino, ethane, violet, solid, compound, attracted, much, attention, precursor, dihydrogen, complexes, names, iupac, name, chlorohydri. Chlorobis dppe iron hydride is a coordination complex 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 1 Chlorobis dppe iron hydride Names IUPAC name Chlorohydridobis bis 1 2 diphenylphosphino ethane iron II Identifiers CAS Number 32490 70 3 3D model JSmol Interactive image InChI InChI 1S 2C26H24P2 ClH Fe H c2 1 5 13 23 14 6 1 27 24 15 7 2 8 16 24 21 22 28 25 17 9 3 10 18 25 26 19 11 4 12 20 26 h2 1 20H 21 22H2 1H q 1 p 1Key NSXBDVRBULAONI UHFFFAOYSA M SMILES Cl FeH 4 56 P c1ccccc1 c2ccccc2 CC P 5 c3ccccc3 c4ccccc4 P c1ccccc1 c2ccccc2 CC P 6 c3ccccc3 c4ccccc4 Properties Chemical formula C 52H 49Cl Fe P 4 Molar mass 889 09 Appearance red violet solid Melting point 195 C 383 F 468 K Except where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa Infobox referencesStructure editThe complex exhibits octahedral molecular geometry The chloride and hydride ligands are mutually trans 2 The bond distances between the iron metal atom and the coordinating ligands are given by the following Bond Bond distance Fe P1 2 238 Fe P2 2 256 Fe P3 2 236 Fe P4 2 255 Fe Cl 2 404 Fe H 1 313Synthesis and reactions editThe compound is synthesized according to the following idealized reaction 3 FeCl2 2 dppe Na BH4 NaCl B2H6 HFeCl dppe 2 nbsp Top view of the structure of 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 and dihydrogen complexes 4 HFeCl dppe 2 NaBF4 N2 HFe N2 dppe 2 BF4 NaCl HFeCl dppe 2 NaBF4 H2 HFe H2 dppe 2 BF4 NaClReferences edit Morris RH 2008 Dihydrogen Dihydride and in Between Nmr and Structural Properties of Iron Group Complexes Coord Chem Rev 2252 21 22 2381 2394 doi 10 1016 j ccr 2008 01 010 Lee J Jung G Lee S W Structure of trans chlorohydridobis diphenylphosphinoethane iron II Bull Korean Chem 1998 19 267 ISSN 0253 2964 Giannoccaro P Sacco A 1977 Bis Ethylenebis Diphenylphosphine Hydridoiron Complexes Inorganic Syntheses Vol 17 pp 69 71 doi 10 1002 9780470132487 ch19 ISBN 9780470132487 a href Template Cite book html title Template Cite book cite book a journal ignored help Bautista MT Bynum LD Schauer CK 1996 Synthesis of h2 Dihydrogen Complex trans Fe h2 H2 H 1 2 bis diphenylphosphino ethane 2 BF4 An Experiment for an Advanced Inorganic Chemistry Laboratory Involving Synthesis and NMR Properties of an h2 H2 Complex Journal of Chemical Education 73 10 988 991 doi 10 1021 ed073p988 Retrieved from https en wikipedia org w index php title Chlorobis dppe iron hydride amp oldid 1173466078, wikipedia, wiki, book, books, library,
