1-Methoxymethyl-5-ethyl-6-(1-naphthylmethyl)uracil
Ge Meng; Lin Hong Weng; Fen Er Chen; Acta Crystallographica Section E 58 (2002) o1075–o1077; doi:10.1107/S1600536802015908

data_2201565
_publ_section_title
;
 1-Methoxymethyl-5-ethyl-6-(1-naphthylmethyl)uracil
;
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1075
_journal_page_last               o1077
_journal_paper_doi               10.1107/S1600536802015908
_journal_volume                  58
_journal_year                    2002
_chemical_formula_moiety         'C19 H20 N2 O3'
_chemical_formula_sum            'C19 H20 N2 O3'
_chemical_formula_weight         324.1437
_chemical_melting_point          169.5(5)
_chemical_name_common            HEPTanalog
_chemical_name_systematic
;
 1-methoxymethyl-5-ethyl-6-(1-naphthyl)uracil
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 110.709(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.325(4)
_cell_length_b                   14.813(5)
_cell_length_c                   11.295(4)
_cell_measurement_reflns_used    783
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      26.578
_cell_measurement_theta_min      2.368
_cell_volume                     1615.9(10)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 1997)'
_computing_data_reduction        'SAINT (Bruker, 1997)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'CCD area-detector'
_diffrn_measurement_method       '\w scans'
_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  0.0401
_diffrn_reflns_av_sigmaI/netI    0.0499
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            7908
_diffrn_reflns_theta_full        27.21
_diffrn_reflns_theta_max         27.21
_diffrn_reflns_theta_min         2.30
_diffrn_standards_decay_%        2.45
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  0.9865
_exptl_absorpt_correction_T_min  0.9776
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.333
_exptl_crystal_density_method    none
_exptl_crystal_description       Block
_exptl_crystal_F_000             688
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.201
_refine_diff_density_min         -0.133
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.014
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     297
_refine_ls_number_reflns         3583
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.014
_refine_ls_R_factor_all          0.1100
_refine_ls_R_factor_gt           0.0595
_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^)+(0.0557P)^2^+0.2622P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1203
_refine_ls_wR_factor_ref         0.1377
_reflns_number_gt                2193
_reflns_number_total             3583
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ob6160.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_chemical_melting_point' value '169-170.' was changed to '169.5(5)'
- the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 

The following automatic conversions were performed:

'_chemical_melting_point' value '169-170.' was changed to '169.5(5)'
- the average value was taken and precision was
estimated.

'_symmetry_cell_setting' value 'Monoclinic' changed to
'monoclinic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1616.0(10)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2201565
_cod_database_fobs_code          2201565