Ring expansion/homologation–aldehyde condensation cascade using tert-trihalomethylcarbinols.
Falck, J. R.; He, Anyu; Reddy, L. Manmohan; Kundu, Abhijit; Barma, Deb K.; Bandyopadhyay, A.; Kamila, Sukanta; Akella, Radha; Bejot, Romain; Mioskowski, Charles; Organic letters 8 (2006) 4645–4647; doi:10.1021/ol061953q

data_1506229
_publ_section_title
;
 Ring expansion/homologation--aldehyde condensation cascade using
 tert-trihalomethylcarbinols.
;
_journal_issue                   20
_journal_name_full               'Organic letters'
_journal_page_first              4645
_journal_page_last               4647
_journal_paper_doi               10.1021/ol061953q
_journal_volume                  8
_journal_year                    2006
_chemical_formula_sum            'C13 H15 Cl3 O'
_chemical_formula_weight         294.56
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.9820(10)
_cell_length_b                   11.036(3)
_cell_length_c                   20.476(13)
_cell_measurement_temperature    291(2)
_cell_volume                     1351.8(10)
_computing_cell_refinement       'HKL2000 v095.373'
_computing_data_collection       'collect, Nonius 1999'
_computing_data_reduction        'HKL2000 v095.373'
_computing_publication_material  'XCIF (Sheldrick and Bruker 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      291(2)
_diffrn_measured_fraction_theta_full 0.876
_diffrn_measured_fraction_theta_max 0.876
_diffrn_measurement_device_type  'KAPPA CCD'
_diffrn_measurement_method       Collect
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0677
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            1196
_diffrn_reflns_theta_full        23.89
_diffrn_reflns_theta_max         23.89
_diffrn_reflns_theta_min         3.55
_exptl_absorpt_coefficient_mu    0.658
_exptl_absorpt_correction_type   none
_exptl_absorpt_process_details   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.448
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             608
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.353
_refine_diff_density_min         -0.355
_refine_diff_density_rms         0.062
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.1(2)
_refine_ls_extinction_coef       0.007(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.905
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     156
_refine_ls_number_reflns         1096
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.905
_refine_ls_R_factor_all          0.0922
_refine_ls_R_factor_gt           0.0553
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1302P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1408
_refine_ls_wR_factor_ref         0.1700
_reflns_number_gt                733
_reflns_number_total             1196
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol061953qsi20060807_045002.cif
_cod_data_source_block           shelxl_21
_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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P212121
_cod_database_code               1506229