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Simple O-coordination and chelating coordination depending on the metal center and auxiliary phosphine ligand
| Content Provider | Semantic Scholar |
|---|---|
| Author | Kim, Yong-Joo Lee, Jae-Young Osakada, Kohtaro |
| Copyright Year | 1998 |
| Abstract | Reactions of cis-PdMe2L2 (L=PMe3, PPh3, 0.5 dppp [dppp=Ph2P(CH2)3PPh2]) with equimolar 2-allylphenol afford the new complexes PdMe(OC6H4CH2CH CH2-o)L2 (1: L=PMe3; 2: L=PPh3; 3: L=0.5 dppp) in moderate to high yields. Addition of 2,2,2-trifluoro-1-phenylethanol to equimolar 1 results in formation of trans-PdMe(O6H4CH2CH CH2-o)(PMe3)2 · (HOCH(CF3) Ph), (4) which has been characterized by X-ray crystallography and NMR spectroscopy. Complex 4 contains O–H···O hydrogen bonding between the allylphenoxido ligand and associated alcohol (O···O=2.635(6) Å). The platinum complex PtMe(OC6H4CH2CH CH2-o)(dppp), (5) is obtained from the alkoxido ligand exchange reaction of PtMe(OCH(CF3)2)(dppp) with 2-allylphenol. Similar reaction of cis-PtMe(OR)(PMe3)2 with equimolar 2-allylphenol at room temperature gives trans-PtMe(OC6H4CH2CH CH2-o)(PMe3)2 (6) in 55% yield. In contrast, reaction of cis-PtMe(OCH(CF3)2)(PMe3)2 · (HOCH(CF3)2) with excess 2-allylphenol at room temperature gives a mixture of 6 and PtMe(h-O, h-C,C-OC6H4CH2CH CH2-o)(PMe3) (7) which are isolated in 16 and 28% yields, respectively. The isolated complex 7 has been characterized by NMR spectroscopy using several pulse techniques and X-ray analysis. The molecule has a distorted square-planar coordination around the metal center. The olefinic group in 2-allylphenoxido ligand is coordinated to the Pt center in a perpendicular fashion to the coordination plane. © 1998 Elsevier Science S.A. All rights reserved. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://knusun.kangnung.ac.kr/~yjkim/Site/JOMC-2.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
