The crystal and molecular structure of a monoclinic phase of iminodiacetic acid

Structural studies on the actinide carboxylates. II. The crystal and molecular structure of bis(iminodiacetato)dioxouranium(VI)

“…The first carboxylate group C(1), O(2), 0(3) is quasicoplanar with plane U, O(2), 0(3) and make an angle of 7"3 ° with the equatorial plane, whereas the second carboxylate group C(4), O(4), 0 (5) In particular a ten-membered ring is formed by the two halves H(3)-N-C(3)-C(4)-O(5) related by a centre of symmetry and presents a chair configuration. Analogous rings are found in a monoclinic phase of iminodiacetic acid (Boman, Herbertsson & Oskarsson, 1974) and in iminodiacetic acid hydroiodide (Oskarsson, 1974).…”

The crystal and molecular structure of iminodiacetic acid hydroiodide, C4H7NO4.HI

“…3). A similar ring is found in a monoclinic phase of iminodiacetic acid (Boman, Herbertsson & Oskarsson, 1974). According to the hydrogen-bond criteria mentioned above, a bifurcated hydrogen bond involving H(6) cannot be excluded since H(6)-O(4) is 2.14 (9) and N-O(4) 2.80 (1) A.…”

Conformational polymorphism. III. The crystal and molecular structures of form II and form III of iminodiacetic acid

“…As part of a program to extend this technique to structures containing hydrogen bonding, we undertook the structure determination of two forms of iminodiacetie acid, NH(CH2COOH) 2, reported here. The structure of one form has been reported earlier (Boman, Herbertsson & Oskarsson, 1974).…”

“…Commercial iminodiacetic acid (Eastman Chemical Co.) was crystallized from water as described by Tomita, Ando & Ueno (1965) and Boman, Herbertsson & Oskarsson (1974). Both IMDA1 (monoclinic, short prismatic) and IMDA2 (orthorhombic, thin plates) are obtained by recrystallization from water.…”

“…In all three cases there is an O (1)-H(1 is clearly different for these two, being to different ends of the molecule. Boman, Herbertsson & Oskarsson (1974) cited the presence of two rings containing hydrogen bonds as the 'most striking feature' of the structure of IMDA 1. Both are shown in Fig.…”