Structural, Spectroscopic, and Theoretical Comparison of Traditional vs Recently Discovered Ln(2+) Ions in the [K(2.2.2-cryptand)][(C5H4SiMe3)3Ln] Complexes: The Variable Nature of Dy(2+) and Nd(2+).
Fieser, Megan E.; MacDonald, Matthew R.; Krull, Brandon T.; Bates, Jefferson E.; Ziller, Joseph W.; Furche, Filipp; Evans, William J.; Journal of the American Chemical Society 137 (2015) 369–382; doi:10.1021/ja510831n

data_4123171
_publ_section_title
;
 Structural, Spectroscopic, and Theoretical Comparison of Traditional vs
 Recently Discovered Ln(2+) Ions in the
 [K(2.2.2-cryptand)][(C5H4SiMe3)3Ln] Complexes: The Variable Nature of
 Dy(2+) and Nd(2+).
;
_journal_issue                   1
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              369
_journal_page_last               382
_journal_paper_doi               10.1021/ja510831n
_journal_volume                  137
_journal_year                    2015
_chemical_formula_sum            'C24 H39 Dy Si3'
_chemical_formula_weight         574.32
_chemical_name_systematic
; 
 ? 
;
_space_group_crystal_system      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   8.2129(5)
_cell_length_b                   22.2848(14)
_cell_length_c                   28.7133(18)
_cell_measurement_reflns_used    9564
_cell_measurement_temperature    143(2)
_cell_measurement_theta_max      28.11
_cell_measurement_theta_min      2.74
_cell_volume                     5255.2(6)
_computing_cell_refinement       'Bruker SAINT 7.68a, 2009'
_computing_data_collection       'Bruker APEX2 2011.4-1, 2011'
_computing_data_reduction        'Bruker SAINT 7.68a, 2009'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      143(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.961
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0285
_diffrn_reflns_av_unetI/netI     0.0157
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.961
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -36
_diffrn_reflns_number            57206
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.961
_diffrn_reflns_theta_full        25.500
_diffrn_reflns_theta_max         28.494
_diffrn_reflns_theta_min         1.418
_exptl_absorpt_coefficient_mu    2.988
_exptl_absorpt_correction_T_max  0.7847
_exptl_absorpt_correction_T_min  0.4132
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.452
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    not_measured
_exptl_crystal_description       irregular
_exptl_crystal_F_000             2328
_exptl_crystal_size_max          0.417
_exptl_crystal_size_mid          0.312
_exptl_crystal_size_min          0.112
_refine_diff_density_max         1.477
_refine_diff_density_min         -0.431
_refine_diff_density_rms         0.082
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     409
_refine_ls_number_reflns         6381
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0264
_refine_ls_R_factor_gt           0.0202
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0241P)^2^+3.9794P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0457
_refine_ls_wR_factor_ref         0.0484
_reflns_Friedel_coverage         0.000
_reflns_number_gt                5493
_reflns_number_total             6381
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja510831n_si_003.cif
_cod_data_source_block           mrm40
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not_measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

 Adding full bibliography for 4123164--4123176.cif.
;
_cod_database_code               4123171
_shelx_estimated_absorpt_t_min   0.369
_shelx_estimated_absorpt_t_max   0.731
_shelxl_version_number           2013-3
_shelx_res_checksum              12732
_shelx_hkl_checksum              36208