Syntheses and Structure Investigations of 3d Transition Metal Complexes with a Flexible N4O2-Donor Hexadentate Schiff-Base Ligand

2017 ◽  
Vol 70 (5) ◽  
pp. 581 ◽  
Author(s):  
Kyle J. Howard-Smith ◽  
Alexander R. Craze ◽  
Mohan Badbhade ◽  
Christopher E. Marjo ◽  
Timothy D. Murphy ◽  
...  
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Schiff Base Ligand ◽  
High Resolution Mass Spectrometry ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure Investigations

The syntheses and structure investigations of four new 3d transition metal complexes (1–4) with a flexible N4O2-donor hexadentate Schiff-base ligand are described; three complexes (1, 2, and 4) of FeIII, CoIII, and CuII metal ions have been investigated by UV-vis, FT-IR, high-resolution mass spectrometry (HR-MS), and scanning electron microscopy–electron dispersive spectroscopy, as well as single crystal X-ray diffraction. The X-ray structure of NiII complex 3 is also reported. The molecular structures of the complexes (1–3) demonstrate distorted octahedral coordination geometry, each exhibiting 1 : 1 (M : L) ratios and the CuII complex 4 shows a trinuclear structure with a CuII : L ratio of 3 : 2 in the solid state, which has been proven by X-ray diffraction. On the other hand, a mononuclear species of the CuII complex is formed in solution, which has been identified by electrospray ionization HR-MS.

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.

Übergangsmetallkomplexe mit Schwefelliganden, LXXIII. Diastereospezifische Dichlormethylierung schwefelreicher [RuII(SRR′)(PPh3)′S4]-Komplexe (SRR′ = einzähniger Thioether- oder Thiol-Ligand; ′S4′2- = 1,2-Bis(2-mercaptophenylthio)ethan(2-)) / Transition Metal Complexes with Sulfur Ligands, LXXIII. Diastereospecific Dichloromethylation of Sulfur Rich [RuII(SRR′)(PPh3)′S4] Complexes (SRR′ = Monodentate Thioether or Thiol Ligand;′S4′2- = 1,2-Bis(2-mercaptophenylthio)ethane(2-))

1991 ◽  
Vol 46 (12) ◽  
pp. 1585-1592 ◽  
Author(s):  
Dieter Sellmann ◽  
Peter Lechner ◽  
Falk Knoch ◽  
Matthias Moll
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Molecular Structures ◽  
X Ray ◽  
X Ray Crystallography ◽  
Thiol Ligand

Under exclusion of air the thioether and thiol complexes [Ru(SRR′)(PPh3)′S4′] (′S4′2- = 1,2-bis(2-mercaptophenylthio)ethane (2—)) easily react with CHCl3 yielding [Ru(Cl)(PPh3)(′S4′—CHCl2)] in which one thiolato atom of the ′S4′ ligand is diastereospecifically dichloromethylated. In the presence of air, however, [RuIII(Cl)(PPh3)′S4′] is formed.The molecular structures of [Ru(Cl)(PPh3)(′S4′-CHCl2)] · 2CHCl3 and [RuIII(Cl)(PPh3)′buS4′] have been determined by X-ray crystallography. ′buS4′2- (= 1,2-bis(3,5-di(t-butyl)-2-mercaptophenylthio)ethane(2-)) is the t-butyl derivative of the ′S4′ ligand. Reasons for observed diastereospecifity of alkylation are discussed.

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