Redetermination of dichloro(N,N,N′,N′-tetramethylethylenediamine)zinc(II)

Chen, Di-Mei; Ma, Xin-Jü; Tu, Bing; Feng, Wen-Jie; Jin, Zhi‐Min

doi:10.1107/s1600536806045016

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…The asymmetric unit contains two molecules of 9 which are so similar that only one of them is discussed and displayed in Figure . Similar to the coordination compounds [ZnCl 2 (tmeda)] and [ZnCl 2 (tmcda)], the zinc center displays a pseudotetrahedral environment with a small N1–Zn1–N2 angle [87.95(7)°] and a large Cl1–Zn1–Cl2 angle [120.18(3)°]. The coordinating bond lengths are quite similar to 2.086(2) Å (N1–Zn1) and 2.076(2) Å (N2–Zn1).…”

Section: Resultsmentioning

confidence: 88%

Formation of Specific Configurations at Stereogenic Nitrogen Centers upon Their Coordination to Zinc and Mercury

et al. 2012

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The coordination of (R,R)-tetramethylcyclohexane-1,2-diamine derivatives with stereogenic nitrogen centers to zinc and mercury halides is investigated. It is shown that the resulting complexes display one specific configuration at the stereogenic nitrogen centers. This fact is unusual due to the fast inversion of nitrogen centers but highly desirable as the stereoinformation of the ligands is brought closer to the metal centers of the potential catalysts. A combination of NMR studies and quantum chemical calculations gives insight into the selective formation of one specific configuration at the stereogenic nitrogen centers of the zinc complexes.

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Section: Resultsmentioning

confidence: 88%

Formation of Specific Configurations at Stereogenic Nitrogen Centers upon Their Coordination to Zinc and Mercury

et al. 2012

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“…In (1-amino-3-dimethylaminopropane)zinc dichloride an average Zn-N distance of 203.6 pm and a Cl-Zn-Cl angle of 112.55(3) • were observed [39]. In (tmeda)ZnCl 2 larger Zn-N bonds of 209.2 pm allow a larger Cl-Zn-Cl bond angle of 119.00(2) • [40,41].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of 1,4-Diamino-2,3-di(2-pyridyl)butane and its Dinuclear Zinc(II) Chloride Complex

Kloubert

Schulz

Görls

et al. 2009

Zeitschrift Für Naturforschung B

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In a Henry-type reaction nitromethane reacts with N-(2-pyridylmethylidene)-methylamine (1) yielding 1-methylamino-1-(2-pyridyl)-2-nitromethane (2) in nearly quantitative yield. This orange compound decomposes slowly in an inert gas atmosphere and fast in contact with air. Therefore 2 has to be stored at −78 • C as a methanol solution. Reduction of 2 with hydrogen in the presence of a Pd/C catalyst leads to the formation of 1,4-dinitro-2,3-di(2-pyridyl)butane (3) in the rather poor yield of 12 %. The major product is the meso-isomer, meso-3, whereas only traces of (R, R)-and (S, S)-isomers of 3 are formed. A conversion of the nitro groups into amino functionalities succeeds with hydrazine hydrate in the presence of a Pd/C catalyst yielding meso-1,4-diamino-2,3-di(2-pyridyl)butane (4). Recrystallization from an aqueous solution gives 4·2H 2 O. The zinc(II) chloride complex 5 with the metal atoms in distorted tetrahedral environments can be isolated after addition of two equivalents of ZnCl 2 to 4. The molecular structures of trimeric 1, meso-3, (R, R)/(S, S)-3, meso-4, and 5 have been determined and are discussed.

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Photoelectron spectra of some organozinc compounds

Barwick

Abu-Izneid

Novak

et al. 2008

Chemical Physics Letters

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Redetermination of dichloro(N,N,N′,N′-tetramethylethylenediamine)zinc(II)

Abstract: Key indicatorsSingle-crystal X-ray study T = 273 K Mean (C-C) = 0.002 Å R factor = 0.025 wR factor = 0.065 Data-to-parameter ratio = 24.3For details of how these key indicators were automatically derived from the article, see

Cited by 5 publications

References 4 publications

Formation of Specific Configurations at Stereogenic Nitrogen Centers upon Their Coordination to Zinc and Mercury

Formation of Specific Configurations at Stereogenic Nitrogen Centers upon Their Coordination to Zinc and Mercury

Synthesis of 1,4-Diamino-2,3-di(2-pyridyl)butane and its Dinuclear Zinc(II) Chloride Complex

Photoelectron spectra of some organozinc compounds

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