Remarkable paramagnetically shifted 1H and 2 H NMR spectra of iron(II) complexes of 2-aza-21-carbaporphyrin:: An evidence for agostic interaction

被引：36

作者：

Rachlewicz, K

Wang, SL

Peng, CH

Hung, CH

Latos-Grazynski, L

机构：

[1] Univ Wroclaw, Dept Chem, PL-50383 Wroclaw, Poland

[2] Natl Changhua Univ Educ, Dept Chem, Changhua 50058, Taiwan

来源：

INORGANIC CHEMISTRY | 2003年 / 42卷 / 23期

关键词：

D O I：

10.1021/ic034886u

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Iron(II) 2-aza-21-carbaporphyrins have been characterized by paramagnetically shifted H-1 and H-2 NMR spectra. The high-spin iron(II) complex (HCTPPH)(FeBr)-Br-11 displays the beta-H resonances which reflect the combination sigma and pi routes of spin density delocalization. The uniquely large isotropic shift of the inner H(21) hydrogen (812 ppm, 298 K) indicates an Fe-11-{C(21)-H} agostic interaction.

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页码：7348 / 7350

页数：3

相关论文

共 26 条

[1] PROTON AND DEUTERIUM NUCLEAR MAGNETIC-RESONANCE STUDIES ON IRON(II) COMPLEXES OF N-SUBSTITUTED PORPHYRINS [J].

BALCH, AL ;

CHAN, YW ;

LAMAR, GN ;

LATOSGRAZYNSKI, L ;

RENNER, MW .

INORGANIC CHEMISTRY, 1985, 24 (10) :1437-1443

[2] HIGHLY OXIDIZED IRON COMPLEXES OF N-METHYLTETRA-PARA-TOLYLPORPHYRIN [J].

BALCH, AL ;

CORNMAN, CR ;

LATOSGRAZYNSKI, L ;

RENNER, MW .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (06) :2230-2237

[3] STUDIES OF THE CHEMICAL OXIDATION OF IRON(II) COMPLEXES OF N-METHYLPORPHYRINS TO FORM THE CORRESPONDING IRON(III) COMPLEXES [J].

BALCH, AL ;

LAMAR, GN ;

LATOSGRAZYNSKI, L ;

RENNER, MW .

INORGANIC CHEMISTRY, 1985, 24 (15) :2432-2436

[4] CHARACTERIZATION OF 5-COORDINATE AND 6-COORDINATE IRON(III) COMPLEXES OF N-METHYLPORPHYRINS [J].

BALCH, AL ;

CORNMAN, CR ;

LATOSGRAZYNSKI, L ;

OLMSTEAD, MM .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1990, 112 (21) :7552-7558

[5] PROTON NUCLEAR MAGNETIC-RESONANCE STUDIES OF IRON PORPHYRIN COMPLEXES WITH A VINYL CARBENE INSERTED BETWEEN IRON AND A PYRROLE NITROGEN [J].

BALCH, AL ;

CHENG, RJ ;

LAMAR, GN ;

LATOSGRAZYNSKI, L .

INORGANIC CHEMISTRY, 1985, 24 (17) :2651-2656

[6] Structural information through NMR hyperfine shifts in blue copper proteins [J].

Bertini, I ;

Fernández, CO ;

Karlsson, BG ;

Leckner, J ;

Luchinat, C ;

Malmström, BG ;

Nersissian, AM ;

Pierattelli, R ;

Shipp, E ;

Valentine, JS ;

Vila, AJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2000, 122 (15) :3701-3707

[7] Synthesis and characterization of iron N-confused porphyrins: Structural evidences of agostic interaction [J].

Chen, WC ;

Hung, CH .

INORGANIC CHEMISTRY, 2001, 40 (20) :5070-+

[8] Symmetry and bonding in metalloporphyrins. A modern implementation for the bonding analyses of five- and six-coordinate high-spin iron(III)-porphyrin complexes through density functional calculation and NMR spectroscopy [J].

Cheng, RJ ;

Chen, PY ;

Lovell, T ;

Liu, TQ ;

Noodleman, L ;

Case, DA .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (22) :6774-6783

[9] Reactions of nickel(II) 2-aza-5,10,15,20-tetraphenyl-21-carbaporphyrin with methyl iodide. The first structural characterization of a paramagnetic organometallic nickel(II) complex [J].

Chmielewski, PJ ;

LatosGrazynski, L ;

Glowiak, T .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1996, 118 (24) :5690-5701

[10] Copper(II) complexes of inverted porphyrin and its methylated derivatives [J].

Chmielewski, PJ ;

Latos-Grazynski, L ;

Schmidt, I .

INORGANIC CHEMISTRY, 2000, 39 (24) :5475-5482