کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1304384 | 974820 | 2010 | 5 صفحه PDF | دانلود رایگان |

Reaction of β-diketiminate lithium salts, nacnacRLi(THF) (R = 2,6-xylyl (1a), R-CH(Me)Ph (1b)), with ZrCl4 or ZrCl4·THF yielded the mono-diketiminate complexes nacnacRZrCl3(THF), 2a and 2b. Complex 2a did not react further with a second equivalent of 1a, but with CpLi or IndLi to form pseudo-tetrahedral complexes 3 and 4. No product could be isolated from reaction of 2b with CpLi. Coordination of the diketiminate ligand in 2a is best described as a distorted κ2-, in-plane coordination. Complexes 3 and 4, however, display a haptotropic shift of the diketiminate ligand and its coordination is best described as κ2,η2-coordination. Although not previously described, analyses of available structures in the literature reveal that non-symmetric κ2,η2-coordination is an independent coordination mode, which exists next to the previously described “η5-like” coordination.
Pseudo-tetrahedral zirconium diketiminate complexes display a bonding mode intermediate between in-plane, κ2 and out-of-plane, “η5-like”, which is best described as a non-symmetric κ2,η2-coordination.Figure optionsDownload as PowerPoint slide
Journal: Inorganic Chemistry Communications - Volume 13, Issue 4, April 2010, Pages 529–533