[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_1506091
_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            'C8 H7 N3 O2.5 S'
_chemical_formula_weight         217.23
_chemical_name_systematic
; 
 5-Thiophen-2-yl-2H-[1,2,3]triazole-4-carboxylic acid methyl ester  
;
_space_group_IT_number           167
_symmetry_cell_setting           rhombohedral
_symmetry_space_group_name_Hall  '-R 3 2"c'
_symmetry_space_group_name_H-M   'R -3 c :H'
_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                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            36
_cell_length_a                   16.4842(6)
_cell_length_b                   16.4842(6)
_cell_length_c                   40.118(3)
_cell_measurement_reflns_used    924
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      20.08
_cell_measurement_theta_min      2.90
_cell_volume                     9440.7(9)
_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 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0751
_diffrn_reflns_av_sigmaI/netI    0.0470
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       47
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            16827
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.75
_exptl_absorpt_coefficient_mu    0.293
_exptl_absorpt_correction_T_max  0.9557
_exptl_absorpt_correction_T_min  0.8625
_exptl_absorpt_correction_type   sadabs(Sheldrick,2001)
_exptl_crystal_colour            COLORLESS
_exptl_crystal_density_diffrn    1.375
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       BLOCK
_exptl_crystal_F_000             4032
_exptl_crystal_size_max          0.52
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.660
_refine_diff_density_min         -0.338
_refine_diff_density_rms         0.083
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.002
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     143
_refine_ls_number_reflns         1856
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.002
_refine_ls_R_factor_all          0.0864
_refine_ls_R_factor_gt           0.0551
_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^)+(0.0949P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1487
_refine_ls_wR_factor_ref         0.1612
_reflns_number_gt                1199
_reflns_number_total             1856
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol0611494si20060511_031509.cif
_cod_data_source_block
5-Thiophen-2-yl-2H-[1,2,3]triazole-4-carboxylic_acid_methyl_ester
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Rhombohedral' changed to
'rhombohedral' 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      R-3c
_cod_original_formula_sum        'C8 H7 N3 O2.50 S'
_cod_database_code               1506091