Regio- and diastereo-selective formation of dicopper(I) and disilver(I) double helicates with chiral 6-substituted 2,2'∶6',2″-terpyridines
Baum, Gerhard; Constable, Edwin C.; Fenske, Dieter; Housecroft, Catherine E.; Kulke, Torsten; Neuburger, Markus; Zehnder, Margareta; Journal of the Chemical Society, Dalton Transactions  (2000) 945–; doi:10.1039/a909158k

data_7009184
_publ_section_title
;
 Regio- and diastereo-selective formation of dicopper(I) and
 disilver(I) double helicates with chiral 6-substituted
 2,2'&#x2236;6',2&#x2033;-terpyridines
;
_journal_issue                   6
_journal_name_full
'Journal of the Chemical Society, Dalton Transactions'
_journal_page_first              945
_journal_paper_doi               10.1039/a909158k
_journal_year                    2000
_chemical_compound_source
;
?
;
_chemical_formula_moiety         ' C25 H27 N3 O '
_chemical_formula_sum            'C25 H27 N3 O'
_chemical_formula_weight         385.51
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_audit_creation_date             98-03-25
_audit_creation_method           CRYSTALS
_cell_angle_alpha                90
_cell_angle_beta                 105.390(7)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   13.190(2)
_cell_length_b                   7.750(1)
_cell_length_c                   21.469(1)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293
_cell_measurement_theta_max      43
_cell_measurement_theta_min      23
_cell_volume                     2115.9(4)
_diffrn_ambient_temperature      293
_diffrn_measurement_method       2\q/\w
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54180
_diffrn_reflns_av_R_equivalents  0.02
_diffrn_reflns_limit_h_max       0
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            5028
_diffrn_reflns_theta_max         74.33
_diffrn_reflns_theta_min         2.19
_diffrn_standards_decay_%        3.47
_diffrn_standards_interval_time  120
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.55
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.94
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   '\y scan'
_exptl_crystal_colour            ' colourless '
_exptl_crystal_density_diffrn    1.21
_exptl_crystal_description       ' needle '
_exptl_crystal_F_000             824
_exptl_crystal_size_max          0.55
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.26
_refine_diff_density_max         0.33
_refine_diff_density_min         -0.31
_refine_ls_abs_structure_details 'not determined'
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_obs   0.7580
_refine_ls_number_parameters     524
_refine_ls_number_reflns         3496
_refine_ls_R_factor_obs          0.0544
_refine_ls_shift/esd_max         0.117820
_refine_ls_structure_factor_coef F
_refine_ls_wR_factor_obs         0.0652
_reflns_limit_h_max              15
_reflns_limit_h_min              -16
_reflns_limit_k_max              9
_reflns_limit_k_min              0
_reflns_limit_l_max              26
_reflns_limit_l_min              0
_reflns_number_observed          3496
_reflns_number_total             4274
_reflns_observed_criterion       >3.00\s(I)
_cod_data_source_file            a909158k.txt
_cod_data_source_block           TKA38
_cod_original_cell_volume        2116.1(4)
_cod_original_sg_symbol_H-M      'P 21'
_cod_original_formula_sum        ' C25 H27 N3 O '
_cod_database_code               7009184