data_2100438
_publ_contact_author_name        'Stephen A. Moggach'
_journal_coeditor_code           GP5004
_journal_date_accepted           2005-12-15
_journal_date_recd_electronic    2005-11-14
_journal_issue                   2
_journal_name_full               'Acta Crystallographica, Section B'
_journal_page_first              310
_journal_page_last               320
_journal_paper_category          FA
_journal_volume                  62
_journal_year                    2006
_chemical_formula_moiety         'C4 H8 N2 O3'
_chemical_formula_sum            'C4 H8 N2 O3'
_chemical_formula_weight         132.12
_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     'Kvick et al., (1979)'
_audit_creation_method           CRYSTALS_ver_12.82
_cell_angle_alpha                90
_cell_angle_beta                 101.214(14)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.2437(8)
_cell_length_b                   9.2083(13)
_cell_length_c                   7.5328(17)
_cell_measurement_reflns_used    1070
_cell_measurement_temperature    293
_cell_measurement_theta_max      52
_cell_measurement_theta_min      6
_cell_volume                     492.86(14)
_computing_cell_refinement       'SAINT (Siemens ,1995)'
_computing_data_collection       'SMART (Siemens, 1993)'
_computing_data_reduction        'SAINT (Siemens ,1995)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'USER DEFINED STRUCTURE SOLUTION'
_diffrn_ambient_temperature      293
_diffrn_measured_fraction_theta_full 0.458
_diffrn_measured_fraction_theta_max 0.401
_diffrn_measurement_device_type  'Bruker APEX II'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.052
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       5
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            2669
_diffrn_reflns_theta_full        25.262
_diffrn_reflns_theta_max         27.164
_diffrn_reflns_theta_min         2.867
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.152
_exptl_absorpt_correction_T_max  0.98
_exptl_absorpt_correction_T_min  0.75
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Siemens, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.780
_exptl_crystal_description       block
_exptl_crystal_F_000             280
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.35
_refine_diff_density_min         -0.33
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.0294
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     37
_refine_ls_number_reflns         422
_refine_ls_number_restraints     17
_refine_ls_R_factor_all          0.0919
_refine_ls_R_factor_gt           0.0719
_refine_ls_shift/su_max          0.000038
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 w=1/[\s^2^(F^2^) + ( 0.08P)^2^ + 2.23P]
where P=(max(Fo^2^,0) + 2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1874
_refine_ls_wR_factor_gt          0.1692
_refine_ls_wR_factor_ref         0.1874
_reflns_number_gt                318
_reflns_number_total             437
_reflns_threshold_expression     I>2.00u(I)
_cod_database_code               2100438
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x,-y,-z
-x,y+1/2,-z+1/2
x,-y+1/2,z+1/2
loop_
_atom_site_type_symbol
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
C C2 0.5214(6) 0.3376(5) 0.2692(10) 0.0177(13) Uiso 1.0000
N N2 0.3849(6) 0.4133(4) 0.1709(9) 0.0181(12) Uiso 1.0000
C C3 0.2395(7) 0.3405(5) 0.0407(11) 0.0195(13) Uiso 1.0000
C C4 0.1426(6) 0.4434(5) -0.1027(10) 0.0183(13) Uiso 1.0000
O O2 0.1782(5) 0.5760(4) -0.0852(8) 0.0252(11) Uiso 1.0000
O O3 0.0300(5) 0.3862(4) -0.2332(8) 0.0301(12) Uiso 1.0000
C C1 0.6607(7) 0.4177(5) 0.4085(11) 0.0198(14) Uiso 1.0000
N N1 0.8432(6) 0.3422(5) 0.4362(9) 0.0203(12) Uiso 1.0000
O O1 0.5317(5) 0.2038(4) 0.2573(8) 0.0262(12) Uiso 1.0000
H H2 0.9270 0.3901 0.5197 0.0244 Uiso 1.0000
H H1 0.8846 0.3395 0.3310 0.0244 Uiso 1.0000
H H3 0.8294 0.2510 0.4746 0.0244 Uiso 1.0000
H H4 0.6758 0.5190 0.3657 0.0237 Uiso 1.0000
H H5 0.6145 0.4207 0.5252 0.0237 Uiso 1.0000
H H6 0.3814 0.5103 0.1842 0.0217 Uiso 1.0000
H H7 0.2985 0.2604 -0.0187 0.0235 Uiso 1.0000
H H8 0.1440 0.2988 0.1059 0.0235 Uiso 1.0000
loop_
_atom_type_symbol
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C 0.0033 0.0016 'International Tables Vol C 4.2.6.8 and 6.1.1.4'
H 0.0000 0.0000 'International Tables Vol C 4.2.6.8 and 6.1.1.4'
N 0.0061 0.0033 'International Tables Vol C 4.2.6.8 and 6.1.1.4'
O 0.0106 0.0060 'International Tables Vol C 4.2.6.8 and 6.1.1.4'
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
_geom_angle_publ_flag
N2 C2 C1 117.6(4) yes
N2 C2 O1 122.4(5) yes
C1 C2 O1 119.8(4) yes
C2 N2 C3 120.1(4) yes
C2 N2 H6 119.9 no
C3 N2 H6 120.0 no
N2 C3 C4 111.7(4) yes
N2 C3 H7 108.9 no
C4 C3 H7 108.9 no
N2 C3 H8 108.9 no
C4 C3 H8 108.9 no
H7 C3 H8 109.5 no
C3 C4 O2 118.8(5) yes
C3 C4 O3 115.9(4) yes
O2 C4 O3 125.3(5) yes
C2 C1 N1 109.3(4) yes
C2 C1 H4 109.5 no
N1 C1 H4 109.5 no
C2 C1 H5 109.5 no
N1 C1 H5 109.5 no
H4 C1 H5 109.5 no
C1 N1 H2 109.5 no
C1 N1 H1 109.5 no
H2 N1 H1 109.5 no
C1 N1 H3 109.5 no
H2 N1 H3 109.5 no
H1 N1 H3 109.5 no
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_publ_flag
C2 N2 1.314(7) yes
C2 C1 1.501(8) yes
C2 O1 1.239(6) yes
N2 C3 1.456(8) yes
N2 H6 0.900 no
C3 C4 1.504(9) yes
C3 H7 1.000 no
C3 H8 1.000 no
C4 O2 1.250(6) yes
C4 O3 1.264(8) yes
C1 N1 1.472(6) yes
C1 H4 1.000 no
C1 H5 1.000 no
N1 H2 0.900 no
N1 H1 0.900 no
N1 H3 0.900 no
