Utility of Anhydrous Neodymium Nitrate as a Precursor to Extended Organoneodymium Nitrate Networks
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- 作者：William J. Evans ; Dimitrios G. Giarikos ; Penny S. Workman ; and Joseph W. Ziller
- 刊名：Inorganic Chemistry
- 出版年：2004
- 出版时间：September 6, 2004
- 年：2004
- 卷：43
- 期：18
- 页码：5754 - 5760
- 全文大小：197K
- 年卷期：v.43,no.18(September 6, 2004)
- ISSN：1520-510X
文摘
Hydrated neodymium nitrates can be readily transformed to anhydrous ether solvates which react with cyclopentadienylreagents to make organometallic nitrate complexes with variable degrees of oligomerization. Heating Nd(NO3)3(H2O)6 in tetrahydrofuran at reflux, removal of solvent, drying at 100 
C under high vacuum, and addition of hotTHF generates Nd(NO3)3(THF)3, 1. Using dimethoxyethane, Nd(NO3)3(DME)2, 2, can be obtained similarly. Additionof NaC5Me5 to 1 generates (C5Me5)Nd(NO3)3(THF)Na(THF)x complexes which crystallize as {[(C5Me5)(NO3)2Nd(THF)(
-NO3)]2Na(THF)4}[Na(THF)6], 3, or [(C5Me5)Nd(THF)(-NO3)3Na(THF)2]n, 4, depending on the conditions.The trimetallic Nd2Na unit in 3 forms an extended system in 4 via bridging nitrates. Addition of KC5Me5 and 18-crown-6 to 1 generates another extended complex [(C5Me5)Nd(THF)(NO3)(-NO3)2K(18-crown-6)]n, 5, in which an18-crown-6 ligated potassium links neodymium centers via two bridging nitrates and an agostic interaction betweena C5Me5 methyl group and potassium.
C under high vacuum, and addition of hotTHF generates Nd(NO3)3(THF)3, 1. Using dimethoxyethane, Nd(NO3)3(DME)2, 2, can be obtained similarly. Additionof NaC5Me5 to 1 generates (C5Me5)Nd(NO3)3(THF)Na(THF)x complexes which crystallize as {[(C5Me5)(NO3)2Nd(THF)(-NO3)]2Na(THF)4}[Na(THF)6], 3, or [(C5Me5)Nd(THF)(-NO3)3Na(THF)2]n, 4, depending on the conditions.The trimetallic Nd2Na unit in 3 forms an extended system in 4 via bridging nitrates. Addition of KC5Me5 and 18-crown-6 to 1 generates another extended complex [(C5Me5)Nd(THF)(NO3)(-NO3)2K(18-crown-6)]n, 5, in which an18-crown-6 ligated potassium links neodymium centers via two bridging nitrates and an agostic interaction betweena C5Me5 methyl group and potassium.