Direct anti and regio-specific aldol reactions of cyclododecanone catalyzed by alkali metal hydroxides: implications for supramolecular helical design
Sathesh, Venkatesan; Umamahesh, Balijapalli; Ramachandran, Gunasekar; Rathore, Ravindranath S.; Sathiyanarayanan, Kulathu Iyer; New Journal of Chemistry 36 (2012) 2292–; doi:10.1039/c2nj40499k

data_7052957
_publ_section_title
;
 Direct anti and regio-specific aldol reactions of cyclododecanone
 catalyzed by alkali metal hydroxides: implications for supramolecular
 helical design
;
_journal_issue                   11
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              2292
_journal_paper_doi               10.1039/c2nj40499k
_journal_volume                  36
_journal_year                    2012
_chemical_formula_moiety         'C21 H32 O2'
_chemical_formula_sum            'C21 H32 O2'
_chemical_formula_weight         316.47
_chemical_name_common
2-((4-ethylphenyl)(hydroxy)methyl)cyclododecanone
_chemical_name_systematic
;
2-[(4-ethylphenyl)(hydroxy)methyl]cyclododecanone
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 100.94(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.665(14)
_cell_length_b                   5.8290(18)
_cell_length_c                   25.713(9)
_cell_measurement_reflns_used    1827
_cell_measurement_temperature    294(2)
_cell_measurement_theta_max      29.1484
_cell_measurement_theta_min      2.6473
_cell_volume                     1864(2)
_computing_cell_refinement
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.66 (release 28-04-2010 CrysAlis171 .NET)
(compiled Apr 28 2010,14:27:37)
;
_computing_data_collection
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.66 (release 28-04-2010 CrysAlis171 .NET)
(compiled Apr 28 2010,14:27:37)
;
_computing_data_reduction
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.66 (release 28-04-2010 CrysAlis171 .NET)
(compiled Apr 28 2010,14:27:37)
;
_computing_molecular_graphics
'ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009)'
_computing_publication_material
'SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      294(2)
_diffrn_detector_area_resol_mean 15.9821
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Oxford Diffraction Xcalibur Eos Gemini'
_diffrn_measurement_method       '\w scan'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0586
_diffrn_reflns_av_sigmaI/netI    0.0664
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            7045
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         3.23
_exptl_absorpt_coefficient_mu    0.070
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.36989
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(CrysAlis Pro; Oxford Diffraction, 2010)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.128
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.260
_refine_diff_density_min         -0.238
_refine_diff_density_rms         0.046
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     213
_refine_ls_number_reflns         3659
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.1003
_refine_ls_R_factor_gt           0.0676
_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^)+(0.0984P)^2^+0.1388P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1733
_refine_ls_wR_factor_ref         0.2113
_reflns_number_gt                2320
_reflns_number_total             3659
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c2nj40499k.txt
_cod_data_source_block           4j
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7052957