Synthesis and characterization of [(CO)4FeL-L] and [(CO)4FeL-LFe(CO)4] wherein L-L is N(CH2CH2)3N and also P(NMeNMe)3P in the latter complex: single crystal X-ray molecular structure of [Fe(CO)4DABCO]

Abstract

Descrevemos aqui a síntese e caracterização de novos compostos mono-e dinucleares derivados de pentacarbonilferro. Herein we report the syntheses and characterization of the novel title mono-and dinuclear compounds from pentacarbonyliron. They were obtained in a stepwise manner by UV irradiation of [Fe(CO)

Dicarbonyl(hexamethylene-1,3,5,7-tetramine-κN1)(η5-pentamethylcyclopentadienyl)iron(II) tetrafluoridoborate

“…For the synthesis of the title compound and structure of the dinuclear compound [Fe 2 ( 5 -C 5 H 5 ) 2 {N 4 (CH 2 ) 6 }(CO) 4 ](BF 4 ) 2 see: M'thiruaine et al (2012a). For other related compounds, see: Allan et al (1970); Darensbourg et al (2003); Lu et al (2004); Matos & Verkade (2003); M'thiruaine et al (2012b); Shafiq et al (2000). For molecular structures of other metal complexes of hexamethylenetetramine, see: Zheng et al (2008); Xue et al (2009).…”

Versatile Reactivity of Cyclic 1,2-Dimethylhydrazinodiphosphines

“…Among them, the cage ligand tris(1,2‐dimethylhydrazinodiphosphine) P(NMeNMe) 3 P is known since a long time , . A few symmetrical complexes of P(NMeNMe) 3 P have been reported, concerning BH 3 ,, W(CO) 5 and Ni(CO) 3 ,, Fe(CO) 4 , and Al(Et) 3 . However, this ligand has not generated a wide attention for decades, until its first use as ligand for catalysis, in the Karash addition of bromotrichloromethane to olefins .…”

Reactions of N-heterocyclic ligands with substitutionally labile organometallic complexes, [(η5-C5R5)Fe(CO)2E]BF4

“…The two {Cp(CO) 2 Fe} units are linked by the HMTA ligand through the nitrogen atoms in which the coordination geometry around Fe can be described as distorted octahedral with three sites occupied by a cyclopentadienyl ligand, while the two carbonyls and the HMTA ligand occupy the remaining three sites. The Fe-N bond distances were found to be 2.0817(17) and 2.0858(18) Å, which are comparable to the 2.092(4) Å in [(CO) 4 Fe(DABCO) [30], but longer than the Fe-N bond lengths previously reported for cyclopentadienylirondicarbonyl amine complexes [44,48,50]. The three carbon atoms adjacent to the iron centre form a base with a distorted tetragonal geometry about nitrogen with N-C bonds in the range 1.514 ± 0.010 Å. Valence angles are: Fe-N-C, 111.89 ± 1.51°and C-N-C, 106.94 ± 0.84°.…”

“…Calc. for C 30 A Schlenk tube was charged with a solution of compound 2 (0.633 g, 1.55 mmol) in CH 2 Cl 2 (15 ml) and a solution of HMTA (0.250 g, 1.79 mmol) in CH 2 Cl 2 (20 ml) was added. The mixture was stirred at room temperature under nitrogen for 18 h. The mixture was then filtered through a cannula into a pre-weighed Schlenk tube and diethyl ether was then added until a yellow precipitate formed.…”

“…Gordon et al have demonstrated that DABCO derivatives can also be used as Voltage-Gated potassium channel blockers [29]. To the best of our knowledge, the DABCO iron complexes of the type [(CO) 4 Fe(DABCO)] and [{(CO) 4 Fe} 2 (l-DABCO)] are the only reported iron carbonyl complexes incorporating the DABCO ligand in the coordination sphere [30].…”