N-[4-(1,4-Dihhydro-pyrazin-2-ylsulfamoyl]-acetamide
Threlfall, Terry L; Coles, Simon J.; Ward, Suzanna C.; Hursthouse, Michael B.; Crystal Structure Report Archive  (1999) 168–; doi:

data_1519218
_publ_section_title
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 N-[4-(1,4-Dihhydro-pyrazin-2-ylsulfamoyl]-acetamide
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_journal_name_full               'Crystal Structure Report Archive'
_journal_page_first              168
_journal_year                    1999
_chemical_formula_sum            'C12 H12 N4 O3 S'
_chemical_formula_weight         292.32
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                104.79(3)
_cell_angle_beta                 104.05(3)
_cell_angle_gamma                98.40(3)
_cell_formula_units_Z            4
_cell_length_a                   8.453(2)
_cell_length_b                   11.809(2)
_cell_length_c                   14.541(3)
_cell_measurement_temperature    320(2)
_cell_volume                     1327.5(6)
_computing_cell_refinement       'DENZO & COLLECT'
_computing_data_collection
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, 1998)'
_computing_data_reduction        'DENZO & COLLECT'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      320(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.979
_diffrn_measured_fraction_theta_max 0.979
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Nonius FR591 rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0497
_diffrn_reflns_av_sigmaI/netI    0.0753
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            11052
_diffrn_reflns_theta_full        25.04
_diffrn_reflns_theta_max         25.04
_diffrn_reflns_theta_min         1.83
_exptl_absorpt_coefficient_mu    0.257
_exptl_absorpt_correction_T_max  0.950
_exptl_absorpt_correction_T_min  0.950
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.463
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             608
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.216
_refine_diff_density_min         -0.341
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.963
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     457
_refine_ls_number_reflns         4582
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.963
_refine_ls_R_factor_all          0.0954
_refine_ls_R_factor_gt           0.0482
_refine_ls_shift/su_max          0.035
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0615P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1049
_refine_ls_wR_factor_ref         0.1245
_reflns_number_gt                2809
_reflns_number_total             4582
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            eCrystal-168.cif
_cod_data_source_block           99scw1-4
_cod_depositor_comments
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Citation :
Threlfall, Terry L and Coles, Simon J. and Ward, Suzanna C and 
Hursthouse, Michael B. (1999) 
University of Southampton, Crystal Structure Report Archive. 
(doi:10.5258/ecrystals/168)

More at:
http://ecrystals.chem.soton.ac.uk/168/
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_cod_original_cell_volume        1327.5(5)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               1519218