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Synthesis and Characterizations of Ti(O‐ i ‐Pr)Cl 3 (THF)(PhCOR) (R = H, Me, Ph) and Ti(O‐ i ‐Pr)Cl 3 (PhCOR) 2 (R = Me, Ph). The Molecular Structure of Ti(O‐ i ‐Pr)Cl 3 (PhCOPh) 2
Author(s) -
Sheen WenShoei,
Kuo ChunNan,
Hsieh ShengHsiang,
Gau HanMou
Publication year - 2004
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200400109
Subject(s) - chemistry , alkoxide , ligand (biochemistry) , benzophenone , titanium , molar ratio , crystallography , medicinal chemistry , stereochemistry , catalysis , polymer chemistry , organic chemistry , biochemistry , receptor
A series of titanium(IV) complexes Ti(O‐ i ‐Pr)Cl 3 (THF)(PhCOR) (R = H ( 1 ), CH 3 ( 2 ), or Ph ( 3 )) is prepared quantitatively from reactions of [Ti(O‐ i ‐Pr)Cl 2 (THF)(μ‐Cl)] 2 with 2 molar equiv. PhCOR. Treatment of Ti(O‐ i ‐Pr)Cl 3 with 2 molar equiv. of PhCOR affords the disubstituted complexes Ti(O‐ i ‐Pr)Cl 3 (PhCOR) 2 (R = CH 3 ( 4 ) or Ph ( 5 )). The 13 C NMR study of these complexes shows that the relative bonding abilities are in the order of PhCOCH 3 > PhCHO > PhCOPh. The molecular structure of 5 reveals that one of the benzophenone ligands is trans to the strongest 2‐propoxide ligand with a long Ti‐O(carbonyl) distance of 2.193(5) Å which is much longer than the other Ti‐O(carbonyl) distance of 2.097(4) Å by ˜0.1 Å. All ligands cis to the alkoxide ligand are bending away from the alkoxide ligand with the RO‐Ti‐L angles ranging from 93.6(2) to 99.0(2)°.