Coordination Polymers in Selective Separation of Cations and Anions: A Series of Rarely Observed All Helical Three-Dimensional Coordination Polymers Derived from Various Chiral Amino Acid Based Bis-pyridyl-bis-amide Ligands
Banerjee, Subhabrata; Dastidar, Parthasarathi; Crystal Growth & Design 11 (2011) 5592–; doi:10.1021/cg201161q

data_4501367
_publ_section_title
;
 Coordination Polymers in Selective Separation of Cations and Anions: A
 Series of Rarely Observed All Helical Three-Dimensional Coordination
 Polymers Derived from Various Chiral Amino Acid Based
 Bis-pyridyl-bis-amide Ligands
;
_journal_issue                   12
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              5592
_journal_paper_doi               10.1021/cg201161q
_journal_volume                  11
_journal_year                    2011
_chemical_formula_sum            'C28 H38 Br2 Cu N8 O9'
_chemical_formula_weight         854.02
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           154
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  'P 32 2"'
_symmetry_space_group_name_H-M   'P 32 2 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                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            3
_cell_length_a                   13.6744(8)
_cell_length_b                   13.6744(8)
_cell_length_c                   15.0225(12)
_cell_measurement_temperature    100(2)
_cell_volume                     2432.7(3)
_computing_cell_refinement       'Bruker Apex II'
_computing_data_collection       'Bruker Apex II'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'Mercury 2.4'
_computing_publication_material  Shelxl-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 3
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker Apex II'
_diffrn_measurement_method       'Omega scan'
_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  0.0746
_diffrn_reflns_av_sigmaI/netI    0.0455
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            25779
_diffrn_reflns_theta_full        26.88
_diffrn_reflns_theta_max         26.88
_diffrn_reflns_theta_min         1.72
_exptl_absorpt_coefficient_mu    3.203
_exptl_absorpt_correction_T_max  0.5963
_exptl_absorpt_correction_T_min  0.4674
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.749
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1299
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.826
_refine_diff_density_min         -1.905
_refine_diff_density_rms         0.173
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.92(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.115
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         3503
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.115
_refine_ls_R_factor_all          0.0800
_refine_ls_R_factor_gt           0.0614
_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^)+(0.0865P)^2^+12.4734P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1591
_refine_ls_wR_factor_ref         0.1727
_reflns_number_gt                2925
_reflns_number_total             3503
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg201161q_si_003.cif
_cod_data_source_block           y
_cod_original_sg_symbol_H-M      P3(2)21
_cod_database_code               4501367