Electrochemical Assembling/Disassembling of Helicates with Hysteresis
Valeria Amendola; Luigi Fabbrizzi; Luca Gianelli; Cristina Maggi; Carlo Mangano; Piersandro Pallavicini; Michele Zema; Inorganic Chemistry 40 (2001) 3579–3587; doi:10.1021/ic001155a

data_4319918
_publ_section_title
;
 Electrochemical Assembling/Disassembling of Helicates with Hysteresis
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              3579
_journal_page_last               3587
_journal_paper_doi               10.1021/ic001155a
_journal_volume                  40
_journal_year                    2001
_chemical_formula_sum            'C56 H54 Cl2 Cu2 N10 O8'
_chemical_formula_weight         1193.07
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 95.79(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.872(7)
_cell_length_b                   18.790(6)
_cell_length_c                   20.971(11)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      11.75
_cell_measurement_theta_min      8.03
_cell_volume                     5438(4)
_computing_cell_refinement       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_collection       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1995)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX (Farrugia, 1998)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Altomare et al, 1993)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Enraf Nonius CAD4'
_diffrn_measurement_method       'non-profiled 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  0.1130
_diffrn_reflns_av_sigmaI/netI    0.0630
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            9838
_diffrn_reflns_theta_full        24.97
_diffrn_reflns_theta_max         24.97
_diffrn_reflns_theta_min         2.00
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  240
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.945
_exptl_absorpt_correction_T_max  0.589
_exptl_absorpt_correction_T_min  0.388
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details
;
 '(North, Philips & Mathews, 1968)'
;
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.457
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             2464
_exptl_crystal_size_max          0.98
_exptl_crystal_size_mid          0.7
_exptl_crystal_size_min          0.56
_refine_diff_density_max         0.502
_refine_diff_density_min         -0.336
_refine_diff_density_rms         0.066
_refine_ls_extinction_coef       0.0006(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     778
_refine_ls_number_reflns         9556
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.1081
_refine_ls_R_factor_gt           0.0584
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0842P)^2^+0.7374P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1450
_refine_ls_wR_factor_ref         0.1628
_reflns_number_gt                5851
_reflns_number_total             9556
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic001155a_3.cif
_cod_data_source_block           palla11
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4319918