New and versatile routes to zirconium imido dichloride compounds.
Dubberley, Stuart R.; Evans, Simon; Boyd, Catherine L.; Mountford, Philip; Dalton transactions (Cambridge, England : 2003)  (2005) 1448–1458; doi:10.1039/b500507h

data_7008276
_publ_section_title
;
 New and versatile routes to zirconium imido dichloride compounds.
;
_journal_issue                   8
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1448
_journal_page_last               1458
_journal_paper_doi               10.1039/b500507h
_journal_year                    2005
_chemical_compound_source
;
?
;
_chemical_formula_moiety         ' C32 H50 Cl4 N2 O4 Zr2 '
_chemical_formula_sum            'C32 H50 Cl4 N2 O4 Zr2'
_chemical_formula_weight         851.00
_chemical_name_common            (Zr2(mu-N-2,6-C6H3Me2)2Cl4(THF)4)
_chemical_name_systematic
;
[Zr2(mu-N-2,6-C6H3Me2)2Cl4(THF)4]
;
_space_group_IT_number           64
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-C 2ac 2'
_symmetry_space_group_name_H-M   'C m c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.7820(3)
_cell_length_b                   17.5806(5)
_cell_length_c                   15.9014(4)
_cell_measurement_reflns_used    2140
_cell_measurement_temperature    150
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      2.910
_cell_volume                     3573.29(16)
_diffrn_ambient_temperature      150
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       CCD
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.019
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            4063
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.91
_diffrn_standards_decay_%        'not measured'
_diffrn_standards_interval_count 'not measured'
_diffrn_standards_interval_time  'not measured'
_diffrn_standards_number         'not measured'
_exptl_absorpt_coefficient_mu    0.92
_exptl_absorpt_correction_T_max  0.847
_exptl_absorpt_correction_T_min  0.817
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.58
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    .
_exptl_crystal_description       block
_exptl_crystal_F_000             1722.41
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.54
_refine_diff_density_min         -0.46
_refine_ls_abs_structure_Flack   none
_refine_ls_extinction_coef       49.4(80)
_refine_ls_extinction_method
'Larson 1970 Crystallographic Computing eq 22'
_refine_ls_goodness_of_fit_ref   1.0221
_refine_ls_hydrogen_treatment    'riding model'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     129
_refine_ls_number_reflns         1829
_refine_ls_number_restraints     0
_refine_ls_R_factor_gt           0.0243
_refine_ls_shift/su_max          0.009
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
Chebychev polynomial with 3 parameters, Carruthers & Watkin , 1979,
0.459    0.353E-010.202
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.0258
_reflns_limit_h_max              16
_reflns_limit_h_min              0
_reflns_limit_k_max              22
_reflns_limit_k_min              0
_reflns_limit_l_max              20
_reflns_limit_l_min              0
_reflns_number_gt                1829
_reflns_number_total             2138
_reflns_threshold_expression     >3.00\s(I)
_cod_data_source_file            b500507h.txt
_cod_data_source_block           COMPOUND_2
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic ' changed to 'orthorhombic'
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 

The following automatic conversions were performed:

'_atom_sites_solution_primary' value 'direct methods' was changed to
'direct'.

'_atom_sites_solution_hydrogens' value 'geometric' was changed to
'geom'.

Automatic conversion script
Id: cif_fix_values 6452 2018-10-05 10:23:21Z andrius 
;
_cod_original_cell_volume        3573.3(2)
_cod_original_sg_symbol_H-M      'C m c a '
_cod_original_formula_sum        ' C32 H50 Cl4 N2 O4 Zr2 '
_cod_database_code               7008276