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#$Date: 2014-06-18 14:40:19 +0300 (Wed, 18 Jun 2014) $
#$Revision: 117840 $
#$URL: file:///home/coder/svn-repositories/cod/cif/2/00/40/2004089.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided by IUCr Journals, http://journals.iucr.org/.
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_2004089
loop_
_publ_author_name
'Zaitu, S.'
'Miwa, Y.'
'Taga, T.'
_publ_section_title
;
1:1 Molecular Complex of Theophylline and p-Nitroaniline
;
_journal_issue 11
_journal_name_full 'Acta Crystallographica Section C'
_journal_page_first 2390
_journal_page_last 2392
_journal_volume 51
_journal_year 1995
_chemical_formula_sum 'C13 H14 N6 O4'
_chemical_formula_weight 318.29
_chemical_name_common 'theophilline p-nitroaniline complex'
_symmetry_cell_setting monoclinic
_symmetry_space_group_name_Hall '-P 2ybc'
_symmetry_space_group_name_H-M 'P 1 21/c 1'
_cell_angle_alpha 90
_cell_angle_beta 116.59(2)
_cell_angle_gamma 90
_cell_formula_units_Z 4
_cell_length_a 7.693(2)
_cell_length_b 9.178(1)
_cell_length_c 22.982(4)
_cell_measurement_reflns_used 25
_cell_measurement_temperature 295.0
_cell_measurement_theta_max 27.3
_cell_measurement_theta_min 17.9
_cell_volume 1451.0(5)
_computing_cell_refinement 'MSC/AFC Diffractometer Control Software'
_computing_data_collection
;
MSC/AFC Diffractometer Control Software
(Molecular Structure Corporation, 1988)
;
_computing_data_reduction 'MSC/AFC Diffractometer Control Software'
_computing_molecular_graphics KPPXRAY
_computing_publication_material 'EDCIF-J (Osaki & Taga, 1993)'
_computing_structure_refinement
;
KPPXRAY (Taga, Masuda, Higashi & Iizuka, 1991) including a modified
version of ORFLS (Busing, Martin & Levy, 1962)
;
_computing_structure_solution 'MULTAN88 (Main et al., 1988)'
_diffrn_ambient_temperature 295.0
_diffrn_measurement_device 'Rigaku AFC-5'
_diffrn_measurement_method \q/2\q
_diffrn_radiation_monochromator graphaite
_diffrn_radiation_source rotarix
_diffrn_radiation_type CuK\a
_diffrn_radiation_wavelength 1.54178
_diffrn_reflns_av_R_equivalents 0.021
_diffrn_reflns_limit_h_max 8
_diffrn_reflns_limit_h_min 0
_diffrn_reflns_limit_k_max 10
_diffrn_reflns_limit_k_min 0
_diffrn_reflns_limit_l_max 24
_diffrn_reflns_limit_l_min -24
_diffrn_reflns_number 2834
_diffrn_reflns_reduction_process NSC/AFC
_diffrn_reflns_theta_max 60
_diffrn_reflns_theta_min 1
_diffrn_standards_decay_% 2
_diffrn_standards_interval_count 150
_diffrn_standards_number 3
_exptl_absorpt_coefficient_mu 0.90
_exptl_absorpt_correction_type none
_exptl_crystal_colour yellow
_exptl_crystal_density_diffrn 1.4568
_exptl_crystal_density_meas 1.43
_exptl_crystal_density_method flotation
_exptl_crystal_description prism
_exptl_crystal_F_000 664
_exptl_crystal_size_max 0.40
_exptl_crystal_size_mid 0.30
_exptl_crystal_size_min 0.30
_refine_diff_density_max 0.38
_refine_diff_density_min -0.45
_refine_ls_extinction_method none
_refine_ls_goodness_of_fit_obs 0.80
_refine_ls_hydrogen_treatment 'refxyz, all from D map'
_refine_ls_matrix_type full
_refine_ls_number_parameters 250
_refine_ls_number_reflns 1780
_refine_ls_R_factor_obs 0.070
_refine_ls_shift/esd_max 0.05
_refine_ls_structure_factor_coef F
_refine_ls_weighting_scheme 'calc w = 1/[\s^2^(F) + 0.023F^2^]'
_refine_ls_wR_factor_obs 0.075
_reflns_number_observed 1780
_reflns_number_total 2621
_reflns_observed_criterion F>3\s(F)
_[local]_cod_data_source_file as1190.cif
_[local]_cod_data_source_block THEOPNA
_[local]_cod_cif_authors_sg_H-M 'P 21/c'
_cod_original_cell_volume 1451.0
_cod_database_code 2004089
loop_
_symmetry_equiv_pos_as_xyz
# Original symmetry operators (space group 'P m c b'):
## +X,+Y,+Z
## -X,-Y,-Z
## -X,1/2+Y,1/2-Z
## -X,1/2-Y,1/2+Z
# Symmetry operators for 'P 1 21/c 1':
X,Y,Z
-X,-Y,-Z
-X,1/2+Y,1/2-Z
X,1/2-Y,1/2+Z
_cod_deposito_comments
;
Replacing the original symmetry operators, which were for the
spacegroup 'P m c b', with the symmetry operators for the declared
space group 'P 1 21/c 1'. After such change, the computed brutto
formulae match the declared one an the packing seems right.
Saulius Gra\