Structure du nitrate d'argent hexaméthylènetetramine

Abstract

AgNO 3. C6H~2N 4 is orthorhombic, space group Pnma with a unit cell a = 13.832 (7), b = 6.535 (4) and and Z = 4. The structure was refined by a full-matrix least-squares technique to a final R = 0.045 for 807 independent reflections measured on an automatic diffractometer. It is made up of sheets which contain • .• Ag-hexamethylenetetramine-Ag-hexamethylenetetramine.., chains and which are parallel to the (100) plane. In each sheet, the chains are linked to one another through Ag-N bonds. Each Ag atom is surrounded by three N atoms which belong to three C6H~2N 4 molecules and two O atoms of a nitrate group. Moreover, a C6H~2N 4 molecule links three Ag atoms. The NO 3 group occupies two positions in statistical disorder. Interatomic distances and bond angles are in good agreement with previously published values. Cohesion between sheets is due to van der Waals interactions.

Structure du caténa-diaqua-μ-(hexaméthylènetétramine-N,N')-dinitratocadmium(II)

“…R6cemment, Pickardt (1981) a d6crit tr6s bri+vement deux compos6s du cuivre(II) et un du mercure(II). On peut y ajouter les structures de 2C6H~2N4.3CdI2.4H20 (Mak, 1981) et de AgNOa.-C6HI2N 4 (Michelet, Viossat, Khodadad & Rodier, 1981). L'6tude, par diffraction X, de Cd(NOa) 2.-C6H12N4.2H20 a &6 entreprise dans le cadre de l'6tude des compos~s de coordination de l'hexam&hy-16net&ramine poursuivie par l'un d'entre nous.…”

Synthesis and structure of the three‐dimensional coordination polymer [Ag3hmt3(μ3 ‐btc)]·5H2O

“…Each hmt molecule connects with three Ag atoms to form two-dimensional honeycomb layers (Fig. 3), which can be observed in the reported two-dimensional polymers of Ag(µ 3 -hmt)(NO 3 ) and Ag(µ-hmt)(hba)(H 2 O) [5,16]. It is a common and stable hexagon network in Ag-hmt family.…”

Crystal structure of hexaaquacobalt(II) dibromide bis(hexamethylenetetramine) tetrahydrate, [(H2O)6Co]Br2 · 2(C6H12N4 ) · 4H2O

“…Hexamethylenetetramine (hmt) can acts not only as ligands in the preparation of the metal complexes [1][2][3][4][5][6][7][8][9][10][11][12] but also as a kind of host molecules in the formation of the inclusion compounds [13][14][15][16][17]. The reaction of CoX (X = halides or pesdohalides) with hmt were reported two decades ago, but few of the crystal structures of the products have been characterized [3].…”