Transition Metal Complexes of Diazenes, XVII [1]. Reactions of 1,2-Diazetines and 1,2-Diazetine-N-oxides with Iron Carbonyls

1982 ◽  
Vol 37 (4) ◽  
pp. 463-467 ◽  
Author(s):  
A. Albini ◽  
H. Kisch ◽  
C. Krüger ◽  
An-Pei Chiang
Keyword(s):  
Molecular Structure ◽  
Transition Metal ◽  
Metal Complexes ◽  
Electronic Properties ◽  
Transition Metal Complexes ◽  
Lone Pair ◽  
X Ray ◽  
Iron Carbonyls

Enneacarbonyldiiron reacts with 3,3,4,4-tetramethyl-1,2-diazetine (L) or its mono-N-oxide (L′) to form complexes (L)Fe(CO)4 (3), (L)Fe2(CO)7 (4), (L)Fe2(CO)6 (5), or (L′)Fe(CO)4 (6), and small amounts of deoxygenated 4 and 5, respectively. Formation and stability of the complexes is compared with those of ligands with smaller and larger ring sizes and discussed in terms of the electronic properties of the ligand lone-pair Orbitals. The molecular structure of 4 is established by X-ray analysis.

Übergangsmetallkomplexe mit Schwefelliganden, LXX. / Transition Metal Complexes with Sulfur Ligands, LXX.

1991 ◽  
Vol 46 (11) ◽  
pp. 1449-1458 ◽  
Author(s):  
Dieter Sellmann ◽  
Bernd Seubert ◽  
Falk Knoch ◽  
Matthias Moll
Keyword(s):  
Molecular Structure ◽  
Nmr Spectroscopy ◽  
Transition Metal ◽  
Metal Complexes ◽  
Structure Analysis ◽  
Transition Metal Complexes ◽  
Pentagonal Bipyramid ◽  
X Ray ◽  
Hydrogen Bonded

In order to study specific properties of transition metal sulfur complexes, reactions of [Mo(NO)2(′S4′)] (1) with nucleophiles were investigated. With sodiumborohydride or hydrazine, 1 yields the hydroxylaminyl complex [Mo(η2-NH2O)(NO)(′S4′)] (2). 2 crystallizes from DMF as 2 · DMF whose molecular structure was determined by X-ray structure analysis (P21/c, Z = 4, a = 1204.4(3), b = 1579.7(4), c = 1253.0(4) pm, β = 117.44(2)°, R = 0,056, Rw = 0,040). The Mo centre is coordinated by two trans thiolato S, two cis thioether S atoms, the co-ligand NO and side-on NH2O in a distorted pentagonal bipyramid; the DMF molecule is hydrogen bonded to the NH2O-ligand. NMR spectroscopy shows that in solution 2 exists in two configurational isomers differing in the orientation of the side-on NH2O with respect to the [Mo(NO)(′S4′)] core. The mechanism of the reduction of 1 is discussed in terms of a 2e--2H+-transfer.

Heavy transition metal complexes of biologically important molecules. I. The crystal and molecular structure of trans-dichloro(bis(isopropyl)-sulfoxide-S)(1-methylcytosine-N)platinum(II)

1976 ◽  
Vol 54 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Colin James Lyne Lock ◽  
Robert Anthony Speranzini ◽  
John Powell
Keyword(s):  
Molecular Structure ◽  
Transition Metal ◽  
Metal Complexes ◽  
Single Crystal ◽  
Least Squares ◽  
Transition Metal Complexes ◽  
Crystal And Molecular Structure ◽  
X Ray Diffraction ◽  
Full Matrix ◽  
X Ray

The crystal and molecular structure of trans-dichloro(bis(isopropyl)sulfoxide-S)(1-methylcytosine-N)platinum(II) has been determined by single crystal X-ray diffraction. The crystals are triclinic with a = 16.205(5), b = 8.078(2), c = 6.776(2) Å, α = 106.53(2), β = 96.35(2), γ = 98.54(2)°. The space group is [Formula: see text] and there are two molecules per unit cell. A total of 2294 independent reflections, of which 2023 were observed, were examined on a Syntex [Formula: see text] diffractometer. The structure was refined by full matrix least squares analysis to an R2 value of 0.0427. The ligands form a rough square around the platinum atom with Pt—Cl(1), 2.304(3), Pt—Cl(2), 2.287(4), Pt—S, 2.232(2), Pt—N, 2.058(7). Distances within the ligands are normal. The plane of the cytosine ring is at 84.4° to the plane formed by the ligands around platinum.

Neue Synthesen Mit Ubergangsmetallkomplexen, X. Mitt / New Syntheses With Transition Metal Complexes, X.

1971 ◽  
Vol 26 (4) ◽  
pp. 305-307 ◽  
Author(s):  
Eugen Müller ◽  
Ernst Langer ◽  
Harald Jäkle ◽  
Helmut Muhm ◽  
W. Hoppe ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Transition Metal ◽  
Metal Complexes ◽  
Coordination Number ◽  
Transition Metal Complexes ◽  
Reaction Path ◽  
Ring Closure ◽  
X Ray

The X-ray determination (W. HOPPE and coworkers) of the structure of the Rh-complex from tris- [triphenylphosphin] -rhodiumchloride and 1.2-bis- [phenylpropinoyl] -benzene (synthesized by E. MÜLLER and coworkers) shows a molecular structure with a metallocyclopentadiene system formed by both C≡C groups and the Rh atom by ring closure. The coordination number of rhodium is 5. The reaction path leading to the complex is discussed, and it is pointed out that the complex does not reacting with typical dienophiles but with acetylenes.

Preparation, properties and structure of some intermediate nido- and arachno-monocarbaboranes

1981 ◽  
Vol 46 (10) ◽  
pp. 2345-2353 ◽  
Author(s):  
Karel Baše ◽  
Bohumil Štíbr ◽  
Jiří Dolanský ◽  
Josef Duben
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Nmr Spectra ◽  
Liquid Ammonia ◽  
X Ray Diffraction ◽  
X Ray ◽  
H Nmr ◽  
Starting Compound

The 6-N(CH3)3-6-CB9H11 carbaborane reacts with sodium in liquid ammonia with the formation of 6-CB9H12- which was used as a starting compound for preparing the 4-CB8H14, 9-L-6-CB9H13 (L = (CH3)2S, CH3CN and P(C6H5)3), 1-(η5-C5H5)-1,2-FeCB9H10-, and 2,3-(η5-C5H5)2-2,31-Co2CB9H10- carboranes. The 4-CB8H14 compound was dehydrogenated at 623 K to give 4-(7)-CB8H12 carborane. Base degradation of 6-N(CH3)3-6-CB9H11 in methanol resulted in the formation of 3,4-μ-N(CH3)3CH-B5H10. The structure of all compounds was proposed on the basis of their 11B and 1H NMR spectra and X-ray diffraction was used in the case of the transition metal complexes.

Synthesis and Electronic Properties of Transition Metal Complexes Containing Sulfonamidoquinoline Ligands

Polyhedron ◽  
2021 ◽  
pp. 115269
Author(s):  
Matthew T. Gole ◽  
Patrick Pauls ◽  
Sage F. Hartlaub ◽  
Chip Nataro ◽  
Lauren M. Rossiter ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Electronic Properties ◽  
Transition Metal Complexes

scholarly journals Experimental and Theoretical Insights into the Electronic Properties of Anionic N-Heterocyclic Dicarbenes through the Rational Synthesis of Their Transition Metal Complexes

2021 ◽  
Vol 60 (6) ◽  
pp. 4015-4025
Author(s):  
Alina A. Grineva ◽  
Oleg A. Filippov ◽  
Yves Canac ◽  
Jean-Baptiste Sortais ◽  
Sergei E. Nefedov ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Electronic Properties ◽  
Transition Metal Complexes
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