Solvent dependent assembly and disassembly of a hydrogen bonded helical structure in a Co-Mo bimetallic complex.
Khatua, Snehadrinarayan; Harada, Takunori; Kuroda, Reiko; Bhattacharjee, Manish; Chemical communications (Cambridge, England)  (2007) 3927–3929; doi:10.1039/b705891h

data_7102151
_publ_section_title
;
 Solvent dependent assembly and disassembly of a hydrogen bonded
 helical structure in a Co-Mo bimetallic complex.
;
_journal_issue                   38
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              3927
_journal_page_last               3929
_journal_paper_doi               10.1039/b705891h
_journal_year                    2007
_chemical_absolute_configuration unk
_chemical_formula_sum            'C40 H72 Co Mo2 N2 O22'
_chemical_formula_weight         1183.81
_chemical_name_systematic
;
?
;
_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'
_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                 96.428(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   13.792(2)
_cell_length_b                   11.692(2)
_cell_length_c                   16.692(5)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      13
_cell_measurement_theta_min      7
_cell_volume                     2674.8(10)
_computing_cell_refinement       CAD4
_computing_data_collection       CAD4
_computing_data_reduction        CAD4
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR-92 (J.Appl.Cryst.1993,26,343-350)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  CAD4-MACH3
_diffrn_measurement_method       /w-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  0.0265
_diffrn_reflns_av_sigmaI/netI    0.1042
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            5161
_diffrn_reflns_theta_full        24.97
_diffrn_reflns_theta_max         24.97
_diffrn_reflns_theta_min         1.23
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  60
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.842
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.452
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1226
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.509
_refine_diff_density_min         -0.526
_refine_diff_density_rms         0.093
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.01(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.065
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     616
_refine_ls_number_reflns         4944
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.065
_refine_ls_R_factor_all          0.1252
_refine_ls_R_factor_gt           0.0525
_refine_ls_shift/su_max          0.010
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
; calc
[0.00000+1.00000exp(0.18(sin\q/\l)^2^)]/
[\s^2^(Fo^2^)+0.0000+0.0000*P+(0.0619P)^2^+0.0000sin\q/\l]
where P = 0.33333Fo^2^ + 0.66667Fc^2^
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1084
_refine_ls_wR_factor_ref         0.1282
_reflns_number_gt                3284
_reflns_number_total             4944
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b705891h.txt
_cod_data_source_block           mbsnk83
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7102151