Hydrated metal(II) complexes of <i>N</i>-(6-amino-3,4-dihydro-3-methyl-5-nitroso-4-oxopyrimidin-2-yl) derivatives of glycine, glycylglycine, threonine, serine, valine and methionine: a monomeric complex and coordination polymers in one, two and three dimensions linked by hydrogen bonding
Godino Salido, M. Luz; Arranz Mascarós, Paloma; López Garzón, Rafael; Gutiérrez Valero, M. Dolores; Low, John N.; Gallagher, John F.; Glidewell, Christopher; Acta Crystallographica Section B 60 (2004) 46–64; doi:10.1107/S0108768103029136

data_2102235
_publ_section_title
;
 Hydrated metal(II) complexes of
 <i>N</i>-(6-amino-3,4-dihydro-3-methyl-5-nitroso-4-oxopyrimidin-2-yl)
 derivatives of glycine, glycylglycine, threonine, serine, valine and
 methionine: a monomeric complex and coordination polymers in one, two
 and three dimensions linked by hydrogen bonding
;
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              46
_journal_page_last               64
_journal_paper_doi               10.1107/S0108768103029136
_journal_volume                  60
_journal_year                    2004
_chemical_formula_moiety         'C18 H30 N12 O14 Sr'
_chemical_formula_sum            'C18 H30 N12 O14 Sr'
_chemical_formula_weight         726.16
_chemical_name_systematic        ?
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 97.2770(12)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.9517(3)
_cell_length_b                   7.7020(2)
_cell_length_c                   26.5416(7)
_cell_measurement_reflns_used    2982
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.45
_cell_measurement_theta_min      3.08
_cell_volume                     2626.30(11)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'Kappa-CCD server software (Nonius, 1997)'
_computing_data_reduction        'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material
'SHELXL-97 (Sheldrick, 1997a) and PRPKAPPA (Ferguson, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997a)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997b)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  Kappa-CCD
_diffrn_measurement_method       '\f scans, and \w scans with \k offsets'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed X-ray tube'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.073
_diffrn_reflns_av_sigmaI/netI    0.0561
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -34
_diffrn_reflns_number            16348
_diffrn_reflns_theta_full        27.45
_diffrn_reflns_theta_max         27.45
_diffrn_reflns_theta_min         3.08
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    2.150
_exptl_absorpt_correction_T_max  0.882
_exptl_absorpt_correction_T_min  0.616
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO-SMN (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            purple
_exptl_crystal_density_diffrn    1.837
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1488
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.06
_refine_diff_density_max         1.428
_refine_diff_density_min         -0.736
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     205
_refine_ls_number_reflns         2982
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0681
_refine_ls_R_factor_gt           0.0486
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0779P)^2^+5.4996P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1260
_refine_ls_wR_factor_ref         0.1344
_reflns_number_gt                2369
_reflns_number_total             2982
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            na5011.cif
_cod_data_source_block           VI
_cod_depositor_comments
;
The following automatic conversions were performed:
'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' 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:

'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' 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_sg_symbol_H-M      'C 2/c'
_cod_database_code               2102235