Synthesis and Properties of Iron(II) Hydride Complexes Containing the Tripodal Tetraphosphine Ligand P(CH2CH2PMe2)3
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- 作者：Leslie D. Field ; Barbara A. Messerle ; and Ronald J. Smernik
- 刊名：Inorganic Chemistry
- 出版年：1997
- 出版时间：December 17, 1997
- 年：1997
- 卷：36
- 期：26
- 页码：5984 - 5990
- 全文大小：260K
- 年卷期：v.36,no.26(December 17, 1997)
- ISSN：1520-510X
文摘
The preparation and characterization of iron(II)hydride complexes containing the tripodal tetraphosphineligandtris[2-(dimethylphosphino)ethyl]phosphine,P(CH2CH2PMe2)3(PP3), 1, are reported. Dissolution of thechlorohydride complex FeHCl(PP3), 2, in methanolaffords an equilibrium mixture of 2 and the methoxy hydridocomplexFeH(OMe)(PP3), 3. Reaction of amethanol solution containing 2 and 3 with anionicor neutral ligands affordsthe corresponding hydrido complexes: reaction with NaBr affordsFeHBr(PP3), 4; reaction with NaI affordsFeHI(PP3), 5; reaction with NaN3 affordsFeHN3(PP3), 6; reaction with COaffords [FeH(CO)(PP3)]+,7; reaction withN2 affords[FeH(N2)(PP3)]+,8; and reaction with PPh3 affords[FeHPPh3(PP3)]+,9. In some cases, further reactionof the product iron hydride complexes is observed. Reaction ofFeHN3(PP3), 6, withNaN3 for an extendedperiod affordsFe(N3)2(PP3),10. On standing in solution,[FeH(N2)(PP3)]+,8, is converted to the dinitrogen-bridged complex[FeH(PP3)N
NFeH(PP3)]2+,11. The carbonyl hydride complex 7 and thedinitrogen hydridecomplex 8 can be deprotonated to give the neutraliron(0) complexes Fe(CO)(PP3),12, and Fe(N2)(PP3),13,respectively. The air-sensitive complexes4-13 were characterized, by multinuclear NMR,IR, Raman, and massspectroscopy and by elemental analysis.
NFeH(PP3)]2+,11. The carbonyl hydride complex 7 and thedinitrogen hydridecomplex 8 can be deprotonated to give the neutraliron(0) complexes Fe(CO)(PP3),12, and Fe(N2)(PP3),13,respectively. The air-sensitive complexes4-13 were characterized, by multinuclear NMR,IR, Raman, and massspectroscopy and by elemental analysis.