Rearrangements and addition reactions of biarylazacyclooctynones and the implications to copper-free click chemistry.
Chigrinova, Mariya; McKay, Craig S.; Beaulieu, Louis-Philippe B; Udachin, Konstantin A.; Beauchemin, André M; Pezacki, John Paul; Organic & biomolecular chemistry 11 (2013) 3436–3441; doi:10.1039/c3ob40683k

data_7152965
_publ_section_title
;
 Rearrangements and addition reactions of biarylazacyclooctynones and the
 implications to copper-free click chemistry.
;
_journal_issue                   21
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              3436
_journal_page_last               3441
_journal_paper_doi               10.1039/c3ob40683k
_journal_volume                  11
_journal_year                    2013
_chemical_formula_sum            'C20 H18 N2 O2'
_chemical_formula_weight         318.36
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 108.664(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.7470(5)
_cell_length_b                   26.1530(19)
_cell_length_c                   8.5985(6)
_cell_measurement_reflns_used    7824
_cell_measurement_temperature    100(1)
_cell_measurement_theta_max      26.37
_cell_measurement_theta_min      2.62
_cell_volume                     1650.5(2)
_computing_cell_refinement       'SAINT (Bruker 2001)'
_computing_data_collection       APEX2
_computing_data_reduction        'SAINT (Bruker 2001)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(1)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Bruker Kappa APEX II CCD'
_diffrn_measurement_method       ' \f & \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  0.0543
_diffrn_reflns_av_sigmaI/netI    0.0403
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       32
_diffrn_reflns_limit_k_min       -30
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            27855
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.49
_diffrn_reflns_theta_min         1.56
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  0.9975
_exptl_absorpt_correction_T_min  0.9673
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.281
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             672
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.230
_refine_diff_density_min         -0.280
_refine_diff_density_rms         0.051
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.071
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     218
_refine_ls_number_reflns         3371
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.071
_refine_ls_R_factor_all          0.0644
_refine_ls_R_factor_gt           0.0429
_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^)+(0.0458P)^2^+0.5763P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0980
_refine_ls_wR_factor_ref         0.1070
_reflns_number_gt                2521
_reflns_number_total             3371
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ob40683k.txt
_cod_data_source_block           mc1a_0m
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7152965