The tetramethylpiperidinyl-1-oxide anion (TMPO–) as a ligand in lanthanide chemistry: synthesis of the per(TMPO–) complex [(ONC5H6Me4)2Sm( µ-ONC5H6Me4)]2
Evans, William J.; Perotti, Jeremy M.; Doedens, Robert J.; Ziller, Joseph W.; Chemical Communications  (2001) 2326–; doi:10.1039/b106869p

data_7114707
_publ_section_title
;
 The tetramethylpiperidinyl-1-oxide anion (TMPO--) as a ligand in
 lanthanide chemistry: synthesis of the per(TMPO--) complex
 [(ONC5H6Me4)2Sm( &#x00B5;-ONC5H6Me4)]2
;
_journal_issue                   22
_journal_name_full               'Chemical Communications'
_journal_page_first              2326
_journal_paper_doi               10.1039/b106869p
_journal_year                    2001
_chemical_formula_sum            'C27 H54 N3 O3 Sm'
_chemical_formula_weight         619.08
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_symmetry_space_group_name_Hall  '-P 1'
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_cell_formula_units_Z            2
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_cell_volume                     1451.5(3)
_computing_cell_refinement       'Bruker SAINT'
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_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      163(2)
_diffrn_measured_fraction_theta_full 0.952
_diffrn_measured_fraction_theta_max 0.952
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       '30s frames at 0.3 deg. omega increments'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
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_exptl_absorpt_coefficient_mu    2.053
_exptl_absorpt_correction_T_max  0.6034
_exptl_absorpt_correction_T_min  0.7730
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'computed via sadabs'
_exptl_crystal_colour            'pale yellow'
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_exptl_crystal_density_meas      ?
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_exptl_crystal_description       plate
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_refine_ls_extinction_coef       n/a
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_refine_ls_R_factor_all          0.0653
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_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^)+(0.05P)^2^+30.0P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1621
_refine_ls_wR_factor_ref         0.1655
_reflns_number_gt                6279
_reflns_number_total             6872
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b106869p.txt
_cod_data_source_block           jp2a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to
/usr/data/users/saulius/automatic-downloads/retrospective/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' 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 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7114707