Nickel-Catalyzed Reductive [2+2] Cycloaddition of Alkynes.
Cañellas, Santiago; Montgomery, John; Pericàs, Miquel À; Journal of the American Chemical Society 140 (2018) 17349–17355; doi:10.1021/jacs.8b09677

data_4133333
_publ_section_title
;
 Nickel-Catalyzed Reductive [2+2] Cycloaddition of Alkynes.
;
_journal_issue                   50
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              17349
_journal_page_last               17355
_journal_paper_doi               10.1021/jacs.8b09677
_journal_volume                  140
_journal_year                    2018
_chemical_formula_sum            'C23 H22 O4'
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_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
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_atom_sites_solution_hydrogens   geom
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_cell_angle_gamma                90
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_cell_length_c                   7.8396(4)
_cell_measurement_reflns_used    6781
_cell_measurement_temperature    100(2)
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_cell_measurement_theta_min      2.41
_cell_volume                     1805.60(15)
_computing_cell_refinement       'Bruker APEX2 v2014.9-0'
_computing_data_collection       'Bruker APEX2 v2014.9-0'
_computing_data_reduction        'Bruker SAINT V7.60A'
_computing_molecular_graphics    'Bruker SHELXTL'
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_diffrn_detector_area_resol_mean 512
_diffrn_detector_type            '4K CCD area detector APEX II'
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.958
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_diffrn_measurement_method
;
 Fullsphere data collection, phi and omega scans
;
_diffrn_measurement_specimen_support 'magnetic support with MicroMount'
_diffrn_radiation_monochromator  'Quazar MX Multilayer Optics'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0213
_diffrn_reflns_av_unetI/netI     0.0189
_diffrn_reflns_Laue_measured_fraction_full 0.998
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_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -16
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_diffrn_reflns_theta_max         33.176
_diffrn_reflns_theta_min         1.919
_diffrn_source                   'Microfocus source E025 IuS'
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_diffrn_source_size              '0.2 mm x 0.2 mm fine focus'
_diffrn_source_type              'Bruker APEX DUO'
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_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
 SADABS Version 2008/1 Bruker-Nonius
 Blessing, Acta Cryst. (1995) A51 33-38
;
_exptl_crystal_colour            colourless
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_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    constr
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_refine_ls_number_restraints     0
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_refine_ls_R_factor_all          0.0502
_refine_ls_R_factor_gt           0.0395
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0620P)^2^+0.8195P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1068
_refine_ls_wR_factor_ref         0.1136
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2741
_reflns_number_total             3308
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja8b09677_si_002.cif
_cod_data_source_block           mo_SCRIV061_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_absorpt_correction_type' value 'Multi-scan' was
changed to 'multi-scan' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/ACS/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/ACS/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               4133333
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_min   0.991
_shelx_estimated_absorpt_t_max   0.995
_shelx_res_checksum              71635
_shelx_hkl_checksum              6110