Structures of ethylenediammonium monohydrogentetraoxophosphate(V) and ethylenediammonium monohydrogentetraoxoarsenate(V)

Abstract

Abstract. (I):b~8.163 (6), c= 8.062 (6)/~, fl= 90.33 (7) °, V= 687 (2) A 3, Z= 4, Dx= 1.953 Mg m -3, 2(Ag Kcz) = 0.5608 ,/k, /~ = 2.740mm -~, F(000) = 408, T= 295 K, final R = 0.038"for 1499 unique reflexions. In both cases planes of XO4 H2-tetrahedra alternate with planes of (CH2) 2-(NHa) 2+ groups. In the first type of planes, XO4H tetrahedra are associated in pairs forming X2OsH42 -NH "X2+ groups. (CH3)2( 312 groups are centrosymmetric for X = As, pseudocentrosymmetric for X = P.Introduction. During investigations of interactions of ethylenediamine with various kinds of acidic monophosphates or monoarsenates we very often observed the formation of very stable compounds corresponding to the formula H3J~rO4(CH2)2(NH2)2 (X= P, As). These compounds appeared later to be interesting starting materials for further syntheses. The present work is devoted to a detailed structural investigation of these two species.

Structures of glycine monophosphate and glycine cyclo-triphosphate

“…3). In most of the previously described interaction compounds between phosphoric acid and amines or amino acids the phosphoric anion is an acidic one, such as H2PO; in glycine monophosphate (present work) and in two L-histidine phosphates, L-His.2H3PO 4 (Blessing, 1986) and L-His.H3PO 4 (Averbuch- Pouchot & Durif, 1988), and HPO~-in ethylenediamine monophosphate (Averbuch-Pouchot & Durif, 1987). [ -7 ...... , 27 r""'l : .…”

Structure of disodium ethylenediammonium bis[monohydrogentetraoxophosphate(V)] hexahydrate

“…[HPO4] 2-, a very stable compound (Averbuch-Pouchot & Durif, 1987). In some cases, the formation of more complex compounds was observed.…”

Synthesis, characterisation, phase transitions and electrical properties of 4-benzylpyridinium dihydrogenmonophosphate and monohydrogensulfate

“…These compounds appeared later to be interesting starting materials for further syntheses. Numerous structures of monophosphate and monosulfate salts have been described; NH 3 (CH 2 ) 2 NH 3 (H 2 PO 4 ) 2 [1], NH 3 (CH 2 ) 2 NH 3 (H 2 PO 4 ) 2 H 3 PO 4 [2], NH 3 (CH 2 ) 2 NH 3 HPO 4 [3], NH 3 (CH 2 ) 3 [6]. In the present work we describe the two crystal structures of the 4-benzylpyridinium dihydrogenmonophosphate/monohydrogensulfate and report some results of impedance spectroscopy and calorimetric measurements (hereafter abbreviated to 4-BP and 4-BPS).…”