Convenient direct synthesis of bisformylated calix[4]arenes via ipso substitution.
Chawla, H. M.; Pant, N.; Srivastava, Bindu; Upreti, Shailesh; Organic letters 8 (2006) 2237–2240; doi:10.1021/ol0605124

data_1505952
_publ_section_title
;
 Convenient direct synthesis of bisformylated calix[4]arenes via ipso
 substitution.
;
_journal_issue                   11
_journal_name_full               'Organic letters'
_journal_page_first              2237
_journal_page_last               2240
_journal_paper_doi               10.1021/ol0605124
_journal_volume                  8
_journal_year                    2006
_chemical_formula_sum            'C H O'
_chemical_formula_weight         29.02
_chemical_name_systematic
; 
 ? 
;
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_symmetry_space_group_name_Hall  '-P 1'
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_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                83.844(3)
_cell_angle_beta                 85.990(3)
_cell_angle_gamma                63.167(3)
_cell_formula_units_Z            53
_cell_length_a                   10.4391(19)
_cell_length_b                   11.314(2)
_cell_length_c                   17.157(3)
_cell_measurement_reflns_used    3662
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      23.53
_cell_measurement_theta_min      2.22
_cell_volume                     1797.2(6)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_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      298(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0359
_diffrn_reflns_av_sigmaI/netI    0.0389
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            11608
_diffrn_reflns_theta_full        21.00
_diffrn_reflns_theta_max         21.00
_diffrn_reflns_theta_min         1.19
_exptl_absorpt_coefficient_mu    0.132
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.421
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             795
_refine_diff_density_max         0.570
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_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    mixed
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_refine_ls_number_parameters     444
_refine_ls_number_reflns         3831
_refine_ls_number_restraints     0
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_refine_ls_R_factor_all          0.1049
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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
'calc w=1/[\s^2^(Fo^2^)+(0.1038P)^2^+1.9625P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2212
_refine_ls_wR_factor_ref         0.2375
_reflns_number_gt                3438
_reflns_number_total             3831
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol0605124si20060301_070408.cif
_cod_data_source_block           tmdfm
_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_sg_symbol_H-M      P-1
_cod_database_code               1505952