data_1100922
_chemical_formula_sum            'C22 H25 Cl N2 O8'
_chemical_formula_weight         480.89
_chemical_name_common            'tetracycline hydrochloride'
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.9300(9)
_cell_length_b                   12.7162(11)
_cell_length_c                   15.7085(13)
_cell_measurement_reflns_used    6452
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      29.20
_cell_measurement_theta_min      2.51
_cell_volume                     2183.3(3)
_diffrn_ambient_temperature      150(2)
_diffrn_measurement_device_type  'Siemens SMART CCD diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_diffrn_radiation_monochromator  'silicon 111'
_diffrn_radiation_source         'Daresbury SRS station 9.8'
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.6883
_diffrn_reflns_av_R_equivalents  0.0468
_diffrn_reflns_av_sigmaI/netI    0.0794
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       4
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            8955
_diffrn_reflns_theta_max         29.26
_diffrn_reflns_theta_min         2.20
_diffrn_standards_decay_%        15
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.228
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.463
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1008
_exptl_crystal_size_max          0.04
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.02
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.02(8)
_refine_ls_extinction_coef       0.0038(12)
_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   0.969
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     399
_refine_ls_number_reflns         4915
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.969
_refine_ls_R_factor_all          0.0633
_refine_ls_R_factor_gt           0.0502
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0579P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1116
_refine_ls_wR_factor_ref         0.1161
_reflns_number_gt                3937
_reflns_number_total             4915
_reflns_threshold_expression     >2sigma(I)
_cod_duplicate_entry             1000006
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1100922