[3+2] cycloaddition reactions in the solid-phase synthesis of 1,2,3-triazoles.
Gao, Yongnian; Lam, Yulin; Organic letters 8 (2006) 3283–3285; doi:10.1021/ol0611494

data_1506093
_publ_section_title
;
 [3+2] cycloaddition reactions in the solid-phase synthesis of
 1,2,3-triazoles.
;
_journal_issue                   15
_journal_name_full               'Organic letters'
_journal_page_first              3283
_journal_page_last               3285
_journal_paper_doi               10.1021/ol0611494
_journal_volume                  8
_journal_year                    2006
_chemical_formula_sum            'C16 H10 Cl N3 O2'
_chemical_formula_weight         311.72
_chemical_name_systematic
; 
 2-Benzyl-8-chloro-2H-5-oxa-1,2,3-triaza-cyclopenta[a]naphthalen-4-one  
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 104.48
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.755(4)
_cell_length_b                   15.225(5)
_cell_length_c                   6.878(2)
_cell_measurement_reflns_used    927
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      24.61
_cell_measurement_theta_min      3.06
_cell_volume                     1394.6(7)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      223(2)
_diffrn_measured_fraction_theta_full 0.803
_diffrn_measured_fraction_theta_max 0.803
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0557
_diffrn_reflns_av_sigmaI/netI    0.0863
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            7408
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.03
_exptl_absorpt_coefficient_mu    0.285
_exptl_absorpt_correction_T_max  0.9710
_exptl_absorpt_correction_T_min  0.8784
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.485
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needles
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.47
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.297
_refine_diff_density_min         -0.182
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.000
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     199
_refine_ls_number_reflns         2567
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.000
_refine_ls_R_factor_all          0.1151
_refine_ls_R_factor_gt           0.0702
_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^)+(0.0427P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1244
_refine_ls_wR_factor_ref         0.1399
_reflns_number_gt                1621
_reflns_number_total             2567
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol0611494si20060511_031509.cif
_cod_data_source_block
2-Benzyl-8-chloro-2H-5-oxa-1,2,3-triaza-cyclopenta[a]naphthalen-4-one
_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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1506093