New versatile ligand family, pyrazine-modulated oligo-alpha-pyridylamino ligands, from coordination polymer to extended metal atom chains.
Ismayilov, Rayyat Huseyn; Wang, Wen-Zhen; Lee, Gene-Hsiang; Wang, Rui-Ren; Liu, Isiah Po-Chun; Yeh, Chen-Yu; Peng, Shie-Ming; Dalton transactions (Cambridge, England : 2003)  (2007) 2898–2907; doi:10.1039/b700533d

data_7005311
_publ_section_title
;
 New versatile ligand family, pyrazine-modulated
 oligo-alpha-pyridylamino ligands, from coordination polymer to
 extended metal atom chains.
;
_journal_issue                   27
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              2898
_journal_page_last               2907
_journal_paper_doi               10.1039/b700533d
_journal_year                    2007
_chemical_formula_sum            'C35.25 H32 Cl2.5 N20 Ni3 O0.75'
_chemical_formula_weight         1012.56
_chemical_name_systematic
;
?
;
_space_group_IT_number           13
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yc'
_symmetry_space_group_name_H-M   'P 1 2/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                 108.0440(13)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   19.2247(3)
_cell_length_b                   10.3082(2)
_cell_length_c                   21.5836(4)
_cell_measurement_reflns_used    all
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      1.00
_cell_volume                     4066.91(13)
_computing_cell_refinement       DENZO-SMN
_computing_data_collection       'NONIUS COLLECT'
_computing_data_reduction        DENZO-SMN
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'NONIUS KappaCCD'
_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  0.0870
_diffrn_reflns_av_sigmaI/netI    0.0881
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            42288
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.11
_exptl_absorpt_coefficient_mu    1.598
_exptl_absorpt_correction_T_max  0.927
_exptl_absorpt_correction_T_min  0.780
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            dark-purple
_exptl_crystal_density_diffrn    1.654
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             2064
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.970
_refine_diff_density_min         -0.697
_refine_diff_density_rms         0.101
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.977
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     543
_refine_ls_number_reflns         9312
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      0.979
_refine_ls_R_factor_all          0.1128
_refine_ls_R_factor_gt           0.0489
_refine_ls_shift/su_max          0.030
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0627P)^2^+2.5164P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1082
_refine_ls_wR_factor_ref         0.1335
_reflns_number_gt                5403
_reflns_number_total             9312
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b700533d.txt
_cod_data_source_block           ic10670
_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        4066.90(13)
_cod_original_sg_symbol_H-M      P2/c
_cod_original_formula_sum        'C35.25 H32 Cl2.50 N20 Ni3 O0.75'
_cod_database_code               7005311