Constructions of 1D helical chains with left-handed/right-handed helicity: a correlation between the helicity of 1D chains and the chirality of building blocks
Zheng, Xiao-Dan; Jiang, Long; Feng, Xiao-Long; Lu, Tong-Bu; Dalton Transactions  (2009) 6802–6808; doi:10.1039/b904081a

data_7001915
_publ_section_title
;
 Constructions of 1D helical chains with left-handed/right-handed
 helicity: a correlation between the helicity of 1D chains and the
 chirality of building blocks
;
_journal_issue                   34
_journal_name_full               'Dalton Transactions'
_journal_page_first              6802
_journal_page_last               6808
_journal_paper_doi               10.1039/b904081a
_journal_year                    2009
_chemical_absolute_configuration ad
_chemical_formula_sum            'C20 H36 N10 Ni'
_chemical_formula_weight         475.30
_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
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_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
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_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.40860(10)
_cell_length_b                   18.7270(2)
_cell_length_c                   8.89430(10)
_cell_measurement_reflns_used    2711
_cell_measurement_temperature    150(2)
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_cell_measurement_theta_min      2.4654
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_computing_cell_refinement
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.31.7 (release 18-10-2006 CrysAlis171 .NET)
(compiled Oct 18 2006,16:28:17)
;
_computing_data_collection
;
CrysAlis CCD, Oxford Diffraction Ltd.,
Version 1.171.31.7 (release 18-10-2006 CrysAlis171 .NET)
(compiled Oct 18 2006,16:28:17)
;
_computing_data_reduction
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.31.7 (release 18-10-2006 CrysAlis171 .NET)
(compiled Oct 18 2006,16:28:17)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 16.0855
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type  'Gemini S Ultra'
_diffrn_measurement_method       '\w and \p scan'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0207
_diffrn_reflns_av_sigmaI/netI    0.0280
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            6707
_diffrn_reflns_theta_full        61.44
_diffrn_reflns_theta_max         61.44
_diffrn_reflns_theta_min         6.24
_exptl_absorpt_coefficient_mu    1.407
_exptl_absorpt_correction_T_max  0.8493
_exptl_absorpt_correction_T_min  0.6616
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.31.7 (release 18-10-2006 CrysAlis171 .NET)
(compiled Oct 18 2006,16:28:17)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            purple
_exptl_crystal_density_diffrn    1.336
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             508
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.120
_refine_diff_density_min         -0.215
_refine_diff_density_rms         0.037
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.038(17)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     285
_refine_ls_number_reflns         3152
_refine_ls_number_restraints     10
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.0217
_refine_ls_R_factor_gt           0.0204
_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^)+(0.0284P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0496
_refine_ls_wR_factor_ref         0.0500
_reflns_number_gt                3032
_reflns_number_total             3152
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b904081a.txt
_cod_data_source_block           R-1
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_cell_volume        1181.22(2)
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               7001915