TY - JOUR
T1 - Facile synthesis and structural properties of (diamine)tetracarboxylatoplatinum(IV) complexes
AU - Kim, Kwan Mook
AU - Lee, Young A.
AU - Lee, Sung Sil
AU - Sohn, Youn Soo
N1 - Funding Information:
This research was financially supported by the Ministry of Science and Technology in Korea.
PY - 1999/9/2
Y1 - 1999/9/2
N2 - (Diamine)tetracarboxylatoplatinum(IV) complexes, A2Pt(OOCR)4 (A2=trans-(±)-1,2-diaminocyclohexane (dach), 2,2-dimethyl-1,3-propanediamine (dmpda), ethylenediamine (en), 2 NH3, 2 cyclopropylamine (cpa); R=CH3, C2H5), have been facilely synthesized by reacting (diamine)tetrahydroxoplatinum(IV) with carboxylic anhydrides in dichloromethane, and their structural properties were examined by X-ray analysis and 1H NMR spectroscopy. The reactant (dach)Pt(OH)4 crystallizes in the triclinic space group P1̄ (No. 2) with two molecules in an asymmetric unit and the local geometry around the platinum(IV) atom is a regular octahedron, but the carboxylated product (dach)Pt(O2CCH3)4 crystallizes in monoclinic space group P21/c (No. 14) and the platinum(IV) atom is in a distorted octahedral environment. The most interesting structural aspect of the title complexes is that the equatorial Pt(IV)-carboxylate bonds are slightly longer than the axial ones, probably due to the difference in trans influence of the nitrogen and oxygen donating atoms. The 1H NMR spectra also show that the axial and equatorial acetate groups are not equivalent.
AB - (Diamine)tetracarboxylatoplatinum(IV) complexes, A2Pt(OOCR)4 (A2=trans-(±)-1,2-diaminocyclohexane (dach), 2,2-dimethyl-1,3-propanediamine (dmpda), ethylenediamine (en), 2 NH3, 2 cyclopropylamine (cpa); R=CH3, C2H5), have been facilely synthesized by reacting (diamine)tetrahydroxoplatinum(IV) with carboxylic anhydrides in dichloromethane, and their structural properties were examined by X-ray analysis and 1H NMR spectroscopy. The reactant (dach)Pt(OH)4 crystallizes in the triclinic space group P1̄ (No. 2) with two molecules in an asymmetric unit and the local geometry around the platinum(IV) atom is a regular octahedron, but the carboxylated product (dach)Pt(O2CCH3)4 crystallizes in monoclinic space group P21/c (No. 14) and the platinum(IV) atom is in a distorted octahedral environment. The most interesting structural aspect of the title complexes is that the equatorial Pt(IV)-carboxylate bonds are slightly longer than the axial ones, probably due to the difference in trans influence of the nitrogen and oxygen donating atoms. The 1H NMR spectra also show that the axial and equatorial acetate groups are not equivalent.
KW - Carboxylato complexes
KW - Crystal structures
KW - Diamine complexes
KW - Platinum complexes
UR - http://www.scopus.com/inward/record.url?scp=0000887849&partnerID=8YFLogxK
U2 - 10.1016/S0020-1693(99)00169-3
DO - 10.1016/S0020-1693(99)00169-3
M3 - Article
AN - SCOPUS:0000887849
SN - 0020-1693
VL - 292
SP - 52
EP - 56
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 1
ER -