Substituent effects. Synthesis and structural characterization of group 4 metallacarboranes containing (CHCH) CBH and [o-C H(CH)]CB H ligands
Organometallics, ISSN: 0276-7333, Vol: 23, Issue: 18, Page: 4301-4307
2004
- 28Citations
- 4Captures
Metric Options: Counts1 Year3 YearSelecting the 1-year or 3-year option will change the metrics count to percentiles, illustrating how an article or review compares to other articles or reviews within the selected time period in the same journal. Selecting the 1-year option compares the metrics against other articles/reviews that were also published in the same calendar year. Selecting the 3-year option compares the metrics against other articles/reviews that were also published in the same calendar year plus the two years prior.
Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Article Description
Substituants on the carborane cage carbons affect not only bonding interactions between the group 4 metal ion and the carboranyl of the C B system but also the reactivity pattern of the resulting metal complexes. Treatment of MCI(THF) with 1 equiv of [(CHCH)C BH]Na(THF), in THF at room temperature gave the bis(carboranyl) complexes {n:n -[(CHCH)C BH]MCI(THF)}{Na(THF) } (M = Zr (1), Hf (2)). Under the same reaction conditions, interaction of TiCl(THF) with 1 equiv of [(C HCH)CB H]Na(THF) led to the isolation of a small amount of TiCl(THF) and B-substituted zwitterionic compound (CHCH) CBH(THF) (4). Reaction of 1 with 1 equiv of Li[N(SiMe)] resulted in the replacement of a Na by a Li, giving the ionic complex [n :n-{(CHCH) CBH}ZrCl-(THF)] [Li(THF)] (3). ClZr[N(SiMe)] was isolated from the reaction of 1 with excess Li-[N(SiMe) ]. An equimolar reaction between M(NEt) and (CHCH)BH afforded the monocarboranyl complexes [n-(C HCH)CB H]M(NEt)(NHEt) (M = Ti (5), Zr (6)). It is believed that the additional N(p )→M(d) interactions stabilize this type of complex. Treatment of MCl(THF) with 1 equiv of less bulky yet rigid [{o-CH(CH) }CBH]Na-(THF) generated a bent-metallocene type of complex, [{o-C H(CH)}CB H]M(THF) (M = Zr (7), Hf (8)). These metallacarboranes were all fully characterized by various spectroscopic techniques and elemental analyses. Molecular structures of 1 and 3-5 were confirmed by single-crystal X-ray analyses.
Bibliographic Details
Provide Feedback
Have ideas for a new metric? Would you like to see something else here?Let us know