Facile Synthesis of 3-Nitro-2-substituted Thiophenes
Cornelius J. O; Connor'; Mark D. Roydhouse; Anna M. Przybył; Michael D. Wall; J. Mike Southern; Journal of Organic Chemistry 75 (2010) 2534–2538; doi:10.1021/jo902656y

data_4025380
_publ_section_title
;
 Facile Synthesis of 3-Nitro-2-substituted Thiophenes
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              2534
_journal_page_last               2538
_journal_paper_doi               10.1021/jo902656y
_journal_volume                  75
_journal_year                    2010
_chemical_formula_sum            'C10 H6 Br N O2 S'
_chemical_formula_weight         284.13
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_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                90.00
_cell_formula_units_Z            4
_cell_length_a                   26.215(6)
_cell_length_b                   3.8912(9)
_cell_length_c                   9.856(2)
_cell_measurement_temperature    396(2)
_cell_volume                     1005.4(4)
_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      396(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker Smart Apex'
_diffrn_measurement_method       'omega and phi 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  0.0965
_diffrn_reflns_av_sigmaI/netI    0.0667
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            4016
_diffrn_reflns_theta_full        23.14
_diffrn_reflns_theta_max         23.14
_diffrn_reflns_theta_min         1.55
_exptl_absorpt_coefficient_mu    4.271
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.83000
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Blessing, Acta Cryst. (1995) A51 33-38.'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.877
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             560
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.07
_refine_diff_density_max         1.573
_refine_diff_density_min         -0.613
_refine_diff_density_rms         0.142
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.030(19)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     136
_refine_ls_number_reflns         1424
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.066
_refine_ls_R_factor_all          0.0489
_refine_ls_R_factor_gt           0.0463
_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^)+(0.0726P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1104
_refine_ls_wR_factor_ref         0.1122
_reflns_number_gt                1339
_reflns_number_total             1424
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo902656y_si_002.cif
_cod_data_source_block           coc10m
_cod_database_code               4025380