Oxidative Ring Contraction of Cyclobutenes: General Approach to Cyclopropylketones including Mechanistic Insights.
Baumann, Andreas N.; Schüppel, Franziska; Eisold, Michael; Kreppel, Andrea; de Vivie-Riedle, Regina; Didier, Dorian; The Journal of organic chemistry 83 (2018) 4905–4921; doi:10.1021/acs.joc.8b00297

data_4035511
_publ_section_title
;
 Oxidative Ring Contraction of Cyclobutenes: General Approach to
 Cyclopropylketones including Mechanistic Insights.
;
_journal_issue                   9
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              4905
_journal_page_last               4921
_journal_paper_doi               10.1021/acs.joc.8b00297
_journal_volume                  83
_journal_year                    2018
_chemical_formula_moiety         'C17 H22 O4'
_chemical_formula_sum            'C17 H22 O4'
_chemical_formula_weight         290.34
_chemical_name_common            ANB
_space_group_crystal_system      monoclinic
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_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_audit_block_code                C17H22O4_vv622_knochel
_audit_creation_method           'APEX3 v2016.9-0'
_audit_update_record             05-Oct-17
_cell_angle_alpha                90
_cell_angle_beta                 90.1720(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.2837(3)
_cell_length_b                   8.5870(3)
_cell_length_c                   24.8197(9)
_cell_measurement_reflns_used    9967
_cell_measurement_temperature    102.(2)
_cell_measurement_theta_max      26.3966
_cell_measurement_theta_min      2.8847
_cell_volume                     1552.34(10)
_computing_cell_refinement       'SAINT V8.37A (Bruker AXS Inc., 2015)'
_computing_data_collection       'APEX3 v2016.5-0, Bruker AXS (2016)'
_computing_data_reduction        'SAINT V8.37A (Bruker AXS Inc., 2015)'
_computing_molecular_graphics    'shelXle (C.B. Huebschle, rev 807)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'XT, VERSION 2014/5'
_diffrn_ambient_temperature      102.(2)
_diffrn_detector_area_resol_mean 7.4074
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device       'fixed-chi three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker D8 Venture TXS'
_diffrn_measurement_method       'mix of phi and omega scans'
_diffrn_radiation_monochromator  'focusing mirrors'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0320
_diffrn_reflns_av_unetI/netI     0.0184
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            26869
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.372
_diffrn_reflns_theta_min         3.283
_diffrn_source                   'rotating anode (TXS)'
_diffrn_source_current           50
_diffrn_source_power             2.5
_diffrn_source_type              'Bruker TXS'
_diffrn_source_voltage           50
_exptl_absorpt_coefficient_mu    0.087
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_exptl_absorpt_correction_T_min  0.9449
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 - Bruker AXS area detector scaling and absorption correction
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.242
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             624
_exptl_crystal_size_max          0.100
_exptl_crystal_size_mid          0.070
_exptl_crystal_size_min          0.060
_refine_diff_density_max         0.232
_refine_diff_density_min         -0.183
_refine_diff_density_rms         0.041
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     194
_refine_ls_number_reflns         3153
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0464
_refine_ls_R_factor_gt           0.0389
_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^)+(0.0425P)^2^+0.7285P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0957
_refine_ls_wR_factor_ref         0.1012
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2736
_reflns_number_total             3153
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo8b00297_si_003.cif
_cod_data_source_block           vv622
_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/data/users/saulius/crontab/automatic-downloads/current/ACS/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_database_code               4035511
_shelx_estimated_absorpt_t_min   0.991
_shelx_estimated_absorpt_t_max   0.995
_shelx_res_checksum              97180
_shelx_hkl_checksum              71833