+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

First-row transition metal complexes of the strongly donating pentadentate ligand PY4Im

First-row transition metal complexes of the strongly donating pentadentate ligand PY4Im

Inorganic Chemistry 49(23): 11223-11230

The new ligand PY4Im, which incorporates an axial N-heterocyclic carbene and four equatorial pyridine donors, is readily prepared on a multigram scale. Six-coordinate first row transition metal complexes of the general formula [(PY4Im)M(MeCN)](2+) (M = Fe, Co, Ni, Cu), where the PY4Im ligand coordinates in a square pyramidal pentadentate fashion, have been prepared. Structural, spectroscopic, and electrochemical characterization of these compounds provides evidence that PY4Im is a strongly donating ligand that favors the formation of low-spin complexes. Chemical oxidation of the iron(II) complex provides a low spin iron(III) complex, which has also been structurally and spectroscopically characterized. In the case of manganese(II), the PY4Im ligand is unable to either enforce a low-spin state or fully accommodate the metal ion. Rather, the ligand binds in a tridentate, face-capping mode.

(PDF emailed within 0-6 h: $19.90)

Accession: 053253394

Download citation: RISBibTeXText

PMID: 21028848

DOI: 10.1021/ic1018407

Related references

Transition-Metal Complexes with Sulfur Ligands. 132.(1) Electron-Rich Fe and Ru Complexes with [MN(2)S(3)] Cores Containing the New Pentadentate Ligand 'N(2)H(2)S(3)'(2)(-) (= 2,2'-Bis(2-mercaptophenylamino)diethyl Sulfide(2-)). Inorganic Chemistry 38(3): 459-466, 2001

A periodic walk: a series of first-row transition metal complexes with the pentadentate ligand PY5. Inorganic Chemistry 41(18): 4633-4641, 2002

Photo- and electrocatalytic H2 production by new first-row transition-metal complexes based on an aminopyridine pentadentate ligand. Chemistry 20(20): 6171-6183, 2014

First-row transition-metal complexes of a new pentadentate ligand, alpha,alpha,alpha',alpha'-tetra(pyrazolyl)lutidine. Inorganic Chemistry 47(17): 7468-7470, 2008

Synthesis and structural characterization of tris(2-seleno-1-mesitylimidazolyl) hydroborato complexes: a new type of strongly electron donating tripodal selenium ligand. Chemical Communications: 3990-3992, 2006

Syntheses and X-ray characterization of metal complexes with the pentadentate thiosemicarbazone ligand bis(4-N-methylthiosemicarbazone)-2,6-diacetylpyridine. The first pentacoordinate lead(II) complex with a pentagonal geometry. Dalton Transactions: 572-579, 2005

Preferential behavior on donating atoms of an ambidentate ligand 2-methylisothiazol-3(2H)-one in its metal complexes. Inorganic Chemistry 52(23): 13375-13383, 2013

The evaluation of cytotoxic activity of planar pentadentate ligand 2',2"'-(2,6-pyridindiyldiethylidyne) dioxamohydrazide dihydrate (H2l x 2H2O) and its metal coordination complexes; pitfalls in the use of the MTT-assay. Journal of Experimental & Clinical Cancer Research 24(1): 63-68, 2005

Transition metal complexes coordinated by an NAD(P)H model compound and their enhanced hydride-donating abilities in the presence of a base. Chemistry 11(14): 4219-4226, 2005

An unexpected role of the monodentate ligand in photocatalytic hydrogen production of the pentadentate ligand-based cobalt complexes. Chemical Communications 50(49): 6520-6522, 2014

Volatile and thermally stable mid to late transition metal complexes containing α-imino alkoxide ligands, a new strongly reducing coreagent, and thermal atomic layer deposition of Ni, Co, Fe, and Cr metal films. Journal of the American Chemical Society 135(34): 12588-12591, 2013

A new class of transition metal pincer ligand: tantalum complexes that feature a [CCC] X3-donor array derived from a terphenyl ligand. Journal of the American Chemical Society 134(4): 2355-2366, 2012

Theoretical study of the conformation of cis carbene-olefin-transition metal complexes: back-donation vs. ligand-ligand interaction. Journal of the American Chemical Society 108(9): 2173-2179, 1986

A very bulky carboxylic perchlorotriphenylmethyl radical as a novel ligand for transition metal complexes. A new spin frustrated metal system. Chemical Communications: 2958-2959, 2003

Univalent transition metal complexes of arenes stabilized by a bulky terphenyl ligand: differences in the stability of Cr(I), Mn(I) or Fe(I) complexes. Chemical Communications: 1014-1016, 2008