Synthesis and structure of six-coordinate iron borohydride complexes supported by PNP ligands.
Synthesis and structure of six-coordinate iron borohydride complexes supported by PNP ligands.
复制标题
PNP配体支持的六配位硼氢化铁配合物的合成与结构
DOI:
10.1021/ic402762v
复制
发表时间:
2014
影响因子:
4.6
通讯作者:
S. Schneider
中科院分区:
文献类型:
--
作者:
I. Koehne;T. J. Schmeier;E. A. Bielinski;C. J. Pan;W. H. Bernskoetter;C. Würtele;M. K. Takase;N. Hazari;S. Schneider
The preparation of a number of iron complexes supported by ligands of the type HN{CH2CH2(PR2)}2[R = isopropyl (iPrPNP) or cyclohexyl (CyPNP)] is reported. This is the first time this important bifunctional ligand has been coordinated to iron. The iron(II) complexes (iPrPNP)FeCl2(CO) (1a) and (CyPNP)FeCl2(CO) (1b) were synthesized through the reaction of the appropriate free ligand and FeCl2in the presence of CO. The iron(0) complex (iPrPNP)Fe(CO)2(2a) was prepared through the reaction of Fe(CO)5withiPrPNP, while irradiating with UV light. Compound2ais unstable in CH2Cl2and is oxidized to1avia the intermediate iron(II) complex [(iPrPNP)FeCl(CO)2]Cl (3a). The reaction of2awith HCl generated the related complex [(iPrPNP)FeH(CO)2]Cl (4a), while the neutral iron hydrides (iPrPNP)FeHCl(CO) (5a) and (CyPNP)FeHCl(CO) (5b) were synthesized through the reaction of1aor1bwith 1 equiv ofnBu4NBH4. The related reaction between1aand excess NaBH4generated the unusual η1-HBH3complex (iPrPNP)FeH(η1-HBH3)(CO) (6a). This complex features a bifurcated intramolecular dihydrogen bond between two of the hydrogen atoms associated with the η1-HBH3ligand and the N–H proton of the pincer ligand, as well as intermolecular dihydrogen bonding. The protonation of6awith 2,6-lutidinium tetraphenylborate resulted in the formation of the dimeric complex [{(iPrPNP)FeH(CO)}2(μ2,η1:η1-H2BH2)][BPh4] (7a), which features a rare example of a μ2,η1:η1-H2BH2ligand. Unlike all previous examples of complexes with a μ2,η1:η1-H2BH2ligand, there is no metal–metal bond and additional bridging ligand supporting the borohydride ligand in7a; however, it is proposed that two dihydrogen-bonding interactions stabilize the complex. Complexes1a,2a,3a,4a,5a,6a, and7awere characterized by X-ray crystallography.
登录
查看更多内容
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
F. Liang;H. Jacobsen;H. Schmalle;A. T. Fox;H. Berke
通讯作者:
H. Berke
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
Jürgen Höck;H. Jacobsen;H. Schmalle;G. Artus;T. Fox;J. I. Amor;and Frank Bäth;H. Berke
通讯作者:
H. Berke
DOI:
--
发表时间:
1984
期刊:
影响因子:
--
作者:
B. Green;C. Kennard;Graham Smith;B. D. James;P. Healy;Allan H. White
通讯作者:
Allan H. White
影响因子:
2.8
作者:
R. Carreno;V. Riera;Miguel A. Ruiz;C. Bois;Y. Jeannin
通讯作者:
Y. Jeannin
DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
Jesse C. Lee;E. Peris;A. Rheingold;R. Crabtree
通讯作者:
R. Crabtree