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_2102233
_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 H28 N10 O12 Sr, 4(H2 O)'
_chemical_formula_sum            'C18 H36 N10 O16 Sr'
_chemical_formula_weight         736.19
_chemical_name_systematic        ?
_space_group_IT_number           5
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 94.4319(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   30.6420(5)
_cell_length_b                   6.48880(10)
_cell_length_c                   7.37330(10)
_cell_measurement_reflns_used    3314
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.45
_cell_measurement_theta_min      2.98
_cell_volume                     1461.65(4)
_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 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0616
_diffrn_reflns_av_sigmaI/netI    0.0483
_diffrn_reflns_limit_h_max       39
_diffrn_reflns_limit_h_min       -39
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            9899
_diffrn_reflns_theta_full        27.45
_diffrn_reflns_theta_max         27.45
_diffrn_reflns_theta_min         2.98
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    1.936
_exptl_absorpt_correction_T_max  0.618
_exptl_absorpt_correction_T_min  0.331
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO-SMN (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.673
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             760
_exptl_crystal_size_max          0.70
_exptl_crystal_size_mid          0.50
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.333
_refine_diff_density_min         -0.463
_refine_ls_abs_structure_details 'Flack (1983), 1486 Friedel pairs'
_refine_ls_abs_structure_Flack   -0.017(4)
_refine_ls_extinction_coef       0.0164(8)
_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   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         3314
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0282
_refine_ls_R_factor_gt           0.0279
_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^)+(0.0300P)^2^+1.5757P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0688
_refine_ls_wR_factor_ref         0.0690
_reflns_number_gt                3291
_reflns_number_total             3314
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            na5011.cif
_cod_data_source_block           IV
_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'
_cod_database_code               2102233