Chromate de 2,2-diméthylpropylènediammonium

Abstract

The crystal structure of the title compound, 2,2‐dimethyl‐1,3‐propanediammonium chromate, (C5H16N2)[CrO4], consists of layers built up from CrO42− tetrahedra alternating with diprotonated 2,2‐dimethylpropylendiamine molecules. N—H⋯O hydrogen bonds ensure the cohesion and stability of the structure.

Bis(2-methyl-2-propanammonium) chromate

“…The 2-methyl-2-propanammonium groups establish hydrogen bond involving the H atoms of the NH 3 groups: one N-H•••O bond has an N•••O distance of 2.806 (2) Å and participates in the cohesion of the two-dimensional network. The N-C and C-C distances, and C-C-N and C-C-C angles in this organic group are comparable whith those observed for other compounds (Cygler et al 1976;Chebbi et al, 2000;Chebbi & Driss, 2001.…”

“…The present description of the bis(2-methyl-2-propanammonium)chromate structure is part of an investigation of materials resulting from interaction between chromic acid and organic molecules, as amines and aminoalcohols. Among the investigated materials, we have previously described 2,2-dimethyl-1,3-propanediammonium chromate (Chebbi et al, 2000), 4-ammonio-2,2,6,6-tetramethylpiperidinium chromate dihydrate (Chebbi & Driss, 2001) and 1,4-butanediammonium chromate (Chebbi & Driss, 2002). Furthermore, the literature gives some examples of CrO 4 2− associated to organic cation: 2(CN 3 H 6 ) + •CrO 4 2− (Cygler et al 1976) and 2[(CH 3 ) 4 N] + •CrO 4 2− .xH 2 O (x = 0.5 or 2; Sorehkin et al, 1978).…”

“…Among the investigated materials, we have previously described 2,2-dimethyl-1,3-propanediammonium chromate (Chebbi et al, 2000), 4-ammonio-2,2,6,6-tetramethylpiperidinium chromate dihydrate (Chebbi & Driss, 2001) and 1,4-butanediammonium chromate (Chebbi & Driss, 2002). Furthermore, the literature gives some examples of CrO 4 2À associated with organic cations: 2(CN 3 H 6 ) + ÁCrO 4 2À (Cygler et al, 1976) and 2[(CH 3 ) 4 N] + ÁCrO 4…”

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

“…La cristallochimie de chromates et de dichromates organiques a pris un essor considé rable ces derniè res anné es. A notre connaissance, 23 composé s ont é té structuralement caracté risé s jusqu'ici (Cygler et al, 1976;Sorehkin et al, 1978;de Bauer et al, 1991;Chebbi et al, 2000Chebbi et al, , 2003Chebbi & Driss, 2001, 2002aSrinivasan et al, 2003Srinivasan et al, , 2004Pecaut & Masse, 1993;Jannin et al, 1993;Lorenzo-Luis et al, 1995;Fossé & Brohan, 1999;Fossé et al, 1998Fossé et al, , 2001Sundar et al, 2003;Pressprich et al, 1990;Jin et al, 2004;Ben Smaïl et al, 2006;Khadhrani et al, 2006).…”

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

“…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.…”