TY - JOUR
T1 - New isostructural ethylenediammonium diphosphates (NH3(CH 2)2NH3)2[Me(HP2O 7)2·2 H2O] [Me = Co, Ni]
T2 - X-ray crystal structure and vibrational spectroscopy
AU - Capitelli, Francesco
AU - El Bali, Brahim
AU - Essehli, Rachid
AU - Lachkar, Mohammed
AU - Valentini, Veronica
AU - Mattei, Giorgio
AU - Taraba, Jan
AU - Zak, Zdirak
PY - 2006
Y1 - 2006
N2 - New ethylenediammonium diphosphates (NH3(CH2) 2NH3)2[Me(HP2O7) 2·2 H2O] [Me = Co (1), Ni (2)] have been synthesized and investigated by single-crystal X-ray diffractometry. The two structures resulted to be isostructural within triclinic space group P1. The unit-cell parameters are: a = 7.5211(6) Å, b = 7.5574(3) Å, c = 9.7689(7) Å, α = 103.6(1)°, β = 111.14(1)°, γ = 98.04(1)°, V = 486.9(1) Å3 (1) and a = 7.4631(15) Å, b = 7.5274(12) Å, c = 9.743(3) Å, α = 104.28(2)°, β = 110.75(2)°, γ = 97.50(2)°, V = 481.4(2) Å3 (2). The three-dimensional network is built up by discrete Me(HP2O 7)2·2 H2O moieties, which, via strong O-H . . . O bonds, form layers parallel to ab plane. Ethylenediammonium groups are located between such layers, stabilizing the framework via N-H . . . O bonds. The hydrogendiphosphate group presents bent eclipsed conformation, while the Me ion lies on inversion centre. The structural data, as the bent POP configuration, have been confirmed by the Raman and infrared spectra of the title compounds. In particular, the non-coincidence between the infrared and Raman bands supports the centrosymmetric structure of the investigated crystals.
AB - New ethylenediammonium diphosphates (NH3(CH2) 2NH3)2[Me(HP2O7) 2·2 H2O] [Me = Co (1), Ni (2)] have been synthesized and investigated by single-crystal X-ray diffractometry. The two structures resulted to be isostructural within triclinic space group P1. The unit-cell parameters are: a = 7.5211(6) Å, b = 7.5574(3) Å, c = 9.7689(7) Å, α = 103.6(1)°, β = 111.14(1)°, γ = 98.04(1)°, V = 486.9(1) Å3 (1) and a = 7.4631(15) Å, b = 7.5274(12) Å, c = 9.743(3) Å, α = 104.28(2)°, β = 110.75(2)°, γ = 97.50(2)°, V = 481.4(2) Å3 (2). The three-dimensional network is built up by discrete Me(HP2O 7)2·2 H2O moieties, which, via strong O-H . . . O bonds, form layers parallel to ab plane. Ethylenediammonium groups are located between such layers, stabilizing the framework via N-H . . . O bonds. The hydrogendiphosphate group presents bent eclipsed conformation, while the Me ion lies on inversion centre. The structural data, as the bent POP configuration, have been confirmed by the Raman and infrared spectra of the title compounds. In particular, the non-coincidence between the infrared and Raman bands supports the centrosymmetric structure of the investigated crystals.
KW - Diphosphate
KW - Ethylenediammonium
KW - Raman and infrared spectroscopy
KW - Single crystal structure analysis
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=33748579214&partnerID=8YFLogxK
U2 - 10.1524/zkri.2006.221.9.649
DO - 10.1524/zkri.2006.221.9.649
M3 - Article
AN - SCOPUS:33748579214
SN - 0044-2968
VL - 221
SP - 649
EP - 655
JO - Zeitschrift fur Kristallographie
JF - Zeitschrift fur Kristallographie
IS - 9
ER -