Crystalline-state conformational change of β-nitrostyrenes and its freezing at low temperature
Harada, Jun; Harakawa, Mayuko; Ogawa, Keiichiro; CrystEngComm 11 (2009) 638–; doi:10.1039/b815869j

data_7200437
_publ_section_title
;
 Crystalline-state conformational change of \b-nitrostyrenes and its
 freezing at low temperature
;
_journal_issue                   4
_journal_name_full               CrystEngComm
_journal_page_first              638
_journal_paper_doi               10.1039/b815869j
_journal_volume                  11
_journal_year                    2009
_chemical_formula_sum            'C10 H12 N2 O2'
_chemical_formula_weight         192.22
_chemical_melting_point          453.15
_chemical_name_common            4-Dimethylamino-beta-nitrostyrene
_chemical_name_systematic
;
4-Dimethylamino-\b-nitrostyrene
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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            8
_cell_length_a                   10.2801(8)
_cell_length_b                   7.4110(5)
_cell_length_c                   25.2458(19)
_cell_measurement_reflns_used    4376
_cell_measurement_temperature    250
_cell_measurement_theta_max      30.0
_cell_measurement_theta_min      2.6
_cell_volume                     1923.4(2)
_computing_cell_refinement       'SAINT (Bruker, 1998)'
_computing_data_collection       'SMART (Bruker, 1998)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      250
_diffrn_detector_area_resol_mean 8.192
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART 1000 CCD diffractometer'
_diffrn_measurement_method       \w_scan
_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  0.0264
_diffrn_reflns_av_sigmaI/netI    0.0130
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       35
_diffrn_reflns_limit_l_min       -35
_diffrn_reflns_number            28081
_diffrn_reflns_theta_full        30.03
_diffrn_reflns_theta_max         30.03
_diffrn_reflns_theta_min         1.61
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.9814
_exptl_absorpt_correction_T_min  0.9633
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2002)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.328
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             816
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.36
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.264
_refine_diff_density_min         -0.236
_refine_diff_density_rms         0.043
_refine_ls_extinction_coef       0.0063(15)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     163
_refine_ls_number_reflns         2816
_refine_ls_number_restraints     15
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0702
_refine_ls_R_factor_gt           0.0535
_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^)+(0.0769P)^2^+0.6363P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1497
_refine_ls_wR_factor_ref         0.1697
_reflns_number_gt                2159
_reflns_number_total             2816
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b815869j.txt
_cod_data_source_block           nme2250k
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value '180_C' was changed to '453.15' - it
was converted from degrees Celsius(C) to Kelvins(K).

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_original_sg_symbol_H-M      P_b_c_a
_cod_database_code               7200437