[(CH3)2NH(CH2)2NH(CH3)2]Cr2O7·H2O, un nouveau dichromate organique

Khadhrani, Hajer; Smaïl, Ridha Ben; Driss, Ahmed; Jouini, Tahar

doi:10.1107/s160053680504153x

Cited by 4 publications

(4 citation statements)

References 21 publications

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“…Owing of the passage of the latter through the bridging atoms O1 and C2 of Cr 2 O 7 and C 3 H 12 N 2 respectively, the asymmetric unit is built by one independent CrO 4 group and the half of a 1,3-diammoniumpropane cation. The main geometrical features of Cr 2 O 7 2agree with those previously observed for this group in other compounds (Akriche & Rzaigui, 2009;Sieroń, 2007;Khadhrani et al, 2006).…”

Section: Propane-13-diammonium Dichromate(vi) Sonia Trabelsi Houda supporting

confidence: 81%

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Propane-1,3-diammonium dichromate(VI)

Trabelsi¹,

Marouani²,

Al-Deyab³

et al. 2012

Acta Cryst E

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The title compound, (C3H12N2)[Cr2O7], consists of a discrete dichromate anion with an eclipsed conformation and a propane-1,3-diammonium cation. Both kinds of ions have a mirror plane passing through the bridging O atom and the central methylene C atom of the Cr2O7 2− and C3H12N2 2+ moieties, respectively. Anions and cations are alternately stacked to form columns parallel to the b axis. Ions are linked by intra- and inter-column hydrogen bonds of types N—H⋯O and C—H⋯O, involving O atoms of the dichromate anions as acceptors, and ammonium or methylene groups as donors.

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Section: Propane-13-diammonium Dichromate(vi) Sonia Trabelsi Houda supporting

confidence: 81%

“…For related structures, see: Akriche & Rzaigui (2009);Sieroń (2007); Khadhrani et al (2006); Kallel et al (1980); Pritchard et al (1992). For a discussion on hydrogen bonding, see: Brown (1976);Blessing (1986).…”

Section: Related Literaturementioning

confidence: 99%

Propane-1,3-diammonium dichromate(VI)

Trabelsi¹,

Marouani²,

Al-Deyab³

et al. 2012

Acta Cryst E

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“…The acentric nature of the CrO 4 tetrahedron has been exploited by the Poeppelmeier group to create new non-centrosymmetric materials [3][4][5]. The flexibility of CrO 4 to exist in several different structural environments can be evidenced by the structural characterization of dichromates and chromates with a variety of counter cations, which include pure inorganic cations , organic ammonium cations [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45], and hybrid organicinorganic complex cations [3][4][5][46][47][48][49]. In the present study, we have investigated the reactions of potassium dichromate and potassium chromate with tris(ethylenediamine)nickel(II) dichloride dihydrate and characterized two new Cr(VI) compounds.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and structural characterization oftris(ethylenediamine)nickel(II) dichromate

Srinivasan

Näther

Pausch

et al. 2009

Journal of Coordination Chemistry

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The reaction of tris(ethylenediamine)nickel(II) dichloride dihydrate with potassium dichromate or potassium chromate results in the formation of mixed metallic compounds tris(ethylenediamine)nickel(II) dichromate [Ni(en) 3 ][Cr 2 O 7 ] (1) (en ¼ ethylenediamine) and tris(ethylenediamine)nickel(II) chromate [Ni(en) 3 ][CrO 4 ] (2). Both compounds were characterized by analysis, spectra, magnetic susceptibility, and the structure of 1 was determined. [Ni(en) 3 ][Cr 2 O 7 ] (1) crystallizes in the centrosymmetric monoclinic space group P2(1)/c and its structure consists of a [Ni(en) 3 ] 2þ dication and a dichromate dianion, with all the atoms situated in a general position. Two carbons of one coordinated (en) in 1 and the hydrogens attached to the amine nitrogen in the same ligand are disordered over two positions. In the crystal structure, tris(ethylenediamine)nickel(II) cations are linked to the [Cr 2 O 7 ] 2À anions with several weak hydrogen bonding interactions resulting in an extended network. The versus T plots of 1 and 2 reveal simple paramagnetic behavior.

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“…For general background, see: ; Khadhrani, Ben Smail, Driss & Jouini (2006); Chebbi & Driss (2001, 2002a; Chebbi et al (2000Chebbi et al ( , 2003. For related structures, see: Chebbi & Driss (2004); Fossé & Brohan (1999); Fossé et al (1998Fossé et al ( , 2001; Lorenzo-Luis et al (1995); Martin-Zarza et al (1995); Srinivasan et al (2003).…”

Section: Related Literaturementioning

confidence: 99%

Bis(ethylenediammonium) dichromate oxalate

2007

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Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.004 Å; disorder in main residue; R factor = 0.041; wR factor = 0.124; data-to-parameter ratio = 12.9.The structure of the title compound, [NH 3 consists of inorganic columns of dichromate anions running along the c axis and organic layers of formula {[(C 2 H 10 N 2 ) 2 ÁC 2 O 4 ] n } 2n+ parallel to the (100) plane. The dichromate anion lies on a crystallographic twofold rotation axis and the oxalate anion on a centre of symmetry. Three of the four crystallographically independent O atoms of the dichromate anion are disordered, two over two sites and one over three sites; the site occupancy factors are approximately 0.65:0.35, 0.7:0.3 and 0.4:0.3:0.3. Structural cohesion is ensured by N-HÁ Á ÁO hydrogen-bonding interactions, which form a three-dimensional framework.

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[(CH₃)₂NH(CH₂)₂NH(CH₃)₂]Cr₂O₇·H₂O, un nouveau dichromate organique

Abstract: Key indicatorsSingle-crystal X-ray study T = 293 K Mean (C-C) = 0.003 Å Disorder in main residue R factor = 0.030 wR factor = 0.080 Data-to-parameter ratio = 14.2 For details of how these key indicators were automatically derived from the article, see

Cited by 4 publications

References 21 publications

Propane-1,3-diammonium dichromate(VI)

Propane-1,3-diammonium dichromate(VI)

Synthesis and structural characterization oftris(ethylenediamine)nickel(II) dichromate

Bis(ethylenediammonium) dichromate oxalate

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