Reactions of ytterbium(<scp>II</scp>) amides with various Brønsted acids, CS<sub>2</sub>or LiNR<sub>2</sub>; crystal structures of [{Yb(NR<sub>2</sub>)(µ-OCBu<sup>t</sup><sub>3</sub>)}<sub>2</sub>] and [Yb(OCBu<sup>t</sup><sub>3</sub>)<sub>2</sub>(thf)<sub>2</sub>](R = SiMe<sub>3</sub>, thf = tetrahydrofuran)
作者:Johannes R. van den Hende、Peter B. Hitchcock、Michael F. Lappert
DOI:10.1039/dt9950002251
日期:——
The reactions of [Yb(NR2)(µ-NR2)}2]I or [Yb(NR2)2(OEt2)2]II(R = SiMe3) with various Brønsted acids, carbondisulfide or LiNR2 with N,N,N′,N′-tetramethylethylenediamine (tmen) afforded the following complexes: (a)[Yb(NR2)(µ-OCBut3)}2]1 from I and 2 But3COH; (b)[Yb(OCBut3)(µ-OCBut3)}2]2 and [Yb(OCBut3)2(thf)2]3 from I and 4 But3COH in hexane or tetrahydrofuran (thf), respectively; (c)[Yb(OCBut3)(OR′)}x]4a(R′=
[Yb(NR 2)(µ-NR 2)} 2 ] I或[Yb(NR 2)2(OEt 2)2 ] II(R = SiMe 3)与各种布朗斯台德酸,二硫化碳或LiNR的反应2与ñ,ñ,ñ ',ñ 'N'-四甲基乙二胺(TMEN),得到下面的络合物:(一)[镱(NR 2)(μ-OCBu吨3)} 2 ] 1从我和2卜吨3COH;(b)[镱(OCBu吨3)(μ-OCBu吨3)} 2 ] 2和[镱(OCBu吨3)2(THF)2 ] 3从我和4卜吨3在己烷或四氢呋喃COH( thf);(c)[ 1]和2 HOR'中的[Yb(OCBu t 3)(OR')} x ] 4a(R'= C 6 H 2 Bu t 2 -2,6-Me-4);(d)[Yb(OCBu t 3)(OR')(thf)2 ] 4b从4a和多余的thf; (e)由4b和过量的吡啶(py)产生的[Yb(OCBu t 3)(OR')(py)x ]
Synthese en serie encombree. preparation de l'acide ditertiobutyl-methylacetique-tBu2 MeCCOOH et de quelques composes cetoniques derives de cette structure
作者:Jacques-Emile Dubois、Ben Li Zhang、Claude Lion
DOI:10.1016/0040-4020(81)85010-7
日期:1981.1
Only Newman's sequence via tBU2CO, tBu2MeCOH, tBu2CCH2, tBu2CHCH2OH, tBu2CHCOOH, tBU2CHCOCI and tBu2CCO, which has been optimized in this work by a direct access to tBu2CHCOOH, permits the preparation of tBu2MeCCOOH. The condensation of the corresponding chloride with a Grignard reagent yields new highly-hindered ketones tBu2MeCCOR which by alkylation give more substituted structures. The limitations
描述了t BU 2 MeCCOOH的合成,这是空间位阻最大的已知方法之一。仅纽曼的序列经由吨BU 2 CO,吨卜2 MeCOH,吨卜2 CCH 2,吨卜2 CHCH 2 OH,吨卜2 CHCOOH,吨BU 2 CHCOCI和吨卜2 CCO,通过直接接触t Bu 2 CHCOOH在此工作中进行了优化,从而可以制备tBu 2 MeCCOOH。相应的氯化物与格氏试剂的缩合产生新的高度受阻的酮t Bu 2 MeCCOR,其通过烷基化得到更多的取代结构。在这项工作中已经研究了每种方法的局限性。
Monomeric manganese(II) alkoxides: syntheses and x-ray crystal structures of novel three- and four-coordinate manganese complexes of the tri-tert-butylmethoxide ligand
作者:Brendan D. Murray、Philip P. Power
DOI:10.1021/ja00335a025
日期:1984.11
Complexes tres sensibles a l'air et a l'humidite. Cristallisation de [LiMn(N(SiMe 3 ) 2 ) (O-C-t-Bu 3 ) 2 }] dans le groupe Cc. L'environnement geometrique de Mn est plan trigonal distordu. [Li 2 MnBr 2 (OC-t-Bu 3 ) 2 }•(THF) 2 ] cristallise dans le groupe P2 1 /c. Les deux complexes contiennent des interactions fortes Li...CH 3
Complexes tres sensibles a l'air et a l'hydrite。[LiMn(N(SiMe 3 ) 2 ) (OCt-Bu 3 ) 2 }] dans le groupe Cc 的结晶。L'environnement geometrique de Mn est plan trigonal distordu。[Li 2 MnBr 2 (OC-t-Bu 3 ) 2 }•(THF) 2 ] 结晶 dans le groupe P2 1 /c。Les deux complexes continnent des相互作用的强项 Li...CH 3
Templating Influence of Molecular Precursors on Pr(OH)<sub>3</sub> Nanostructures
([Pr3(μ3-OtBu)2(μ2-OtBu)3(OtBu)4(HOtBu)2] (1), [PrOC(tBu)3}3(THF)] (2), [PrClN(SiMe3)2}2(THF)]2 (3), and [PrClOC(tBu)3}2(THF)]2 (4)) were synthesized and structurally characterized by single-crystal X-ray diffraction analysis. Application of these compounds in solvothermal synthesis of praseodymium oxide/hydroxide nanostructures showed their templating influence on the morphology and phase composition
tBu3CO, THF = tetrahydrofuran) have been prepared by treating UCI4 with (tritox)Li. Compund II was a precursor for a series of (tritox)2UX2 compounds (X = BH4, CH3COCHCOCH3, η-C3H5, CH2Ph). The uranium borohydride derivative (tritox)U(BH4)3(THF) (IX) was isolated from the reaction of U(BH4)4(THF)2 with (tritox)H and was successively transformed into (tritox)2U(BH4)2 (IV) and (tritox)3U(BH4) (XI) by treatment