New structural motifs in chromium(iii) calix[4 and 6]arene chemistry
Redshaw, Carl; Homden, Damien; Hughes, David L.; Wright, Joseph A.; Elsegood, Mark R. J.; Dalton Transactions  (2009) 1231–1242; doi:10.1039/b813313a

data_7000495
_publ_section_title
;
 New structural motifs in chromium(iii) calix[4 and 6]arene chemistry
;
_journal_issue                   7
_journal_name_full               'Dalton Transactions'
_journal_page_first              1231
_journal_page_last               1242
_journal_paper_doi               10.1039/b813313a
_journal_year                    2009
_chemical_formula_moiety         'C92 H112 Cr2 N2 O8, 4(C3 H6 O), 0.5(H2 O)'
_chemical_formula_structural
'[Cr(calix[4]arene-H)(NCMe)]2.4(Me2CO).0.5(H2O)'
_chemical_formula_sum            'C104 H137 Cr2 N2 O12.5'
_chemical_formula_weight         1719.16
_chemical_name_common
'Chromium (calix(4)arene-H) acetonitrile adduct dimer'
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      61
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   21.5322(9)
_cell_length_b                   18.5174(6)
_cell_length_c                   24.3085(11)
_cell_measurement_temperature    140(1)
_cell_volume                     9692.3(7)
_computing_cell_refinement
;
CrysAlis RED, Oxford Diffraction Ltd., Version 1.171.29.9
;
_computing_data_collection
;
CrysAlis CCD, Oxford Diffraction Ltd., Version 1.171.29.9
;
_computing_data_reduction
;
CrysAlis RED, Oxford Diffraction Ltd., Version 1.171.29.9
;
_computing_molecular_graphics    'ORTEP (Johnson, 1971)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      140(1)
_diffrn_detector_area_resol_mean 16.0050
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Oxford Diffraction Xcalibur 3/CCD'
_diffrn_measurement_method       'Thin slice \f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           Mo-K\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1069
_diffrn_reflns_av_sigmaI/netI    0.0598
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            60445
_diffrn_reflns_theta_full        20.25
_diffrn_reflns_theta_max         20.25
_diffrn_reflns_theta_min         3.47
_exptl_absorpt_coefficient_mu    0.284
_exptl_absorpt_correction_T_max  1.014
_exptl_absorpt_correction_T_min  0.989
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlis RED, Oxford Diffraction Ltd., Version 1.171.29.9
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            blue-grey
_exptl_crystal_density_diffrn    1.178
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       fragment
_exptl_crystal_F_000             3692
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.659
_refine_diff_density_min         -0.221
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.003
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     611
_refine_ls_number_reflns         4658
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      1.002
_refine_ls_R_factor_all          0.0928
_refine_ls_R_factor_gt           0.0549
_refine_ls_shift/su_max          0.010
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0955P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1341
_refine_ls_wR_factor_ref         0.1502
_reflns_number_gt                3180
_reflns_number_total             4658
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            b813313a.txt
_cod_data_source_block           4
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 
;
_cod_original_sg_symbol_H-M      Pbca
_cod_original_formula_sum        'C104 H137 Cr2 N2 O12.50'
_cod_database_code               7000495