Water-induced reversible structural phase transformation with chromotropism in metal supramolecular frameworks containing aminopyrazine and sulfate anions.
Boonmak, Jaursup; Nakano, Motohiro; Chaichit, Narongsak; Pakawatchai, Chaveng; Youngme, Sujittra; Dalton transactions (Cambridge, England : 2003) 39 (2010) 8161–8167; doi:10.1039/c002556a

data_7025661
_publ_section_title
;
 Water-induced reversible structural phase transformation with
 chromotropism in metal supramolecular frameworks containing aminopyrazine
 and sulfate anions.
;
_journal_issue                   35
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              8161
_journal_page_last               8167
_journal_paper_doi               10.1039/c002556a
_journal_volume                  39
_journal_year                    2010
_chemical_formula_sum            'C4 H10 Cd N3 O6 S'
_chemical_formula_weight         340.61
_chemical_name_common
'mu-2-aminopyrazine-diaqua-mu-sulfato cadmium(ii) monohydrate'
_chemical_name_systematic
;
mu-2-aminopyrazine-diaqua-mu-sulfato cadmium(II) monohydrate
;
_space_group_IT_number           12
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 106.7190(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   19.4038(4)
_cell_length_b                   7.3913(4)
_cell_length_c                   6.6216(3)
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.29
_cell_measurement_theta_min      2.19
_cell_volume                     909.52(7)
_computing_cell_refinement       'SAINT (Bruker, 2000)'
_computing_data_collection       'SMART (Bruker, 2000)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.975
_diffrn_measured_fraction_theta_max 0.975
_diffrn_measurement_device_type
;
Siemens SMART CCD area detector diffractometer
;
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0207
_diffrn_reflns_av_sigmaI/netI    0.0149
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            1729
_diffrn_reflns_theta_full        25.29
_diffrn_reflns_theta_max         25.29
_diffrn_reflns_theta_min         2.19
_exptl_absorpt_coefficient_mu    2.647
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.727363
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2000)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    2.487
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             668
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.750
_refine_diff_density_min         -0.663
_refine_diff_density_rms         0.187
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.264
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     82
_refine_ls_number_reflns         859
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.264
_refine_ls_R_factor_all          0.0336
_refine_ls_R_factor_gt           0.0334
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0682P)^2^+3.9868P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1102
_refine_ls_wR_factor_ref         0.1104
_reflns_number_gt                850
_reflns_number_total             859
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c002556a.txt
_cod_data_source_block           4_Cd
_cod_original_sg_symbol_H-M      c2/m
_cod_database_code               7025661