ParaCEST MRI contrast agents capable of derivatization via"click" chemistry.
Milne, Mark; Chicas, Kirby; Li, Alex; Bartha, Robert; Hudson, Robert H. E.; Organic & biomolecular chemistry 10 (2012) 287–292; doi:10.1039/c1ob06162c

data_7152109
_publ_section_title
;
 ParaCEST MRI contrast agents capable of derivatization via"click"
 chemistry.
;
_journal_issue                   2
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              287
_journal_page_last               292
_journal_paper_doi               10.1039/c1ob06162c
_journal_volume                  10
_journal_year                    2012
_chemical_formula_moiety
'C28 H42 N8 O5 Tb, C3 H6 O, 3(H2 O), 2(Cl H), H O, Cl'
_chemical_formula_sum            'C31 H57 Cl3 N8 O10 Tb'
_chemical_formula_weight         967.12
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                113.338(2)
_cell_angle_beta                 103.205(3)
_cell_angle_gamma                99.220(2)
_cell_formula_units_Z            2
_cell_length_a                   10.8916(5)
_cell_length_b                   14.3620(6)
_cell_length_c                   15.4604(10)
_cell_measurement_reflns_used    9943
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.67
_cell_measurement_theta_min      2.56
_cell_volume                     2075.0(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \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  0.0518
_diffrn_reflns_av_sigmaI/netI    0.0170
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            246235
_diffrn_reflns_theta_full        28.70
_diffrn_reflns_theta_max         28.70
_diffrn_reflns_theta_min         1.52
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.957
_exptl_absorpt_correction_T_max  0.9436
_exptl_absorpt_correction_T_min  0.8179
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.548
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             990
_exptl_crystal_size_max          0.11
_exptl_crystal_size_mid          0.07
_exptl_crystal_size_min          0.03
_refine_diff_density_max         1.591
_refine_diff_density_min         -1.077
_refine_diff_density_rms         0.084
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     513
_refine_ls_number_reflns         10723
_refine_ls_number_restraints     15
_refine_ls_restrained_S_all      1.066
_refine_ls_R_factor_all          0.0263
_refine_ls_R_factor_gt           0.0224
_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^)+(0.0288P)^2^+2.5533P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0574
_refine_ls_wR_factor_ref         0.0598
_reflns_number_gt                9933
_reflns_number_total             10723
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1ob06162c.txt
_cod_data_source_block           b10069ap-1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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        2075.04(19)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7152109