Group 4 permethylindenyl constrained geometry complexes for ethylene polymerisation catalysis
作者:Thomas J. Williams、Jean-Charles Buffet、Zoë R. Turner、Dermot O'Hare
DOI:10.1039/c8cy01374h
日期:——
We report the synthesis and characterisation of six permethylindenyl constrained geometry complexes of the type Me2SB(RN,I*)TiCl2 ((η5-C9Me6)Me2Si(RN)}TiCl2; R = i-Pr, t-Bu, n-Bu, Ph, 4-t-BuPh and 4-n-BuPh). Three complexes (R = i-Pr, t-Bu and 4-t-BuPh) have been structurally characterised using single crystal X-ray diffraction. Reaction with solid polymethylaluminoxane (sMAO) yields solid catalysts
申请人:DONGJIN SEMICHEM CO., LTD. 주식회사 동진쎄미켐(119981067679) Corp. No ▼ 120111-0003848BRN ▼137-81-07814
公开号:KR20210056804A
公开(公告)日:2021-05-20
기판과의 반응성이 우수하며, 넓은 온도 구간에서 불순물 함량이 낮은 금속 박막을 형성할 수 있는 금속 전구체 화합물 및 이를 이용한 금속막 증착 방법이 개시된다. 상기 금속막 증착용 금속 전구체 화합물은 [화학식 1] , [화학식 2] , [화학식 3] 로 표시되는 화합물로 이루어진 군으로부터 선택된다(여기서, M은 Si, Ge 및 Sn로 이루어진 군으로부터 선택되는 금속이고, R, R 및 R은 각각 독립적으로 수소 또는 탄소수 1 내지 5의 탄화수소기이며, X은 각각 독립적으로 할로겐 원소이다).
Low-Coordinate Iron(II) Amido Complexes of β-Diketiminates: Synthesis, Structure, and Reactivity
作者:Nathan A. Eckert、Jeremy M. Smith、Rene J. Lachicotte、Patrick L. Holland
DOI:10.1021/ic035483x
日期:2004.5.1
L(R)Fe(OtBu)(OTf), the angles at nitrogen and oxygen result from stericeffects and not pi-bonding. The reactions of the amido group of L(R)FeNHAr with weak acids (HCCPh and HOtBu) are consistent with a basic nitrogen atom, because the amido group is protonated by terminal alkynes and alcohols to give free H(2)NAr and three-coordinate acetylide and alkoxide complexes. The trends in complex stability give insight
介绍了一系列低配位的Fe(II)二酮化酰胺基配合物的合成,结构和反应活性。配合物L(R)FeNHAr(R =甲基,叔丁基; Ar =对甲苯基,2,6-二甲苯基和2,6-二异丙基苯基)结合路易斯碱,得到三角锥型和三角型双锥体加合物。在加合物中,晶体学和(1)H NMR证据支持固相和溶液状态存在有害的相互作用。可以使用AgOTf氧化配合物L(R)FeNHAr,并用(19)F NMR光谱,UV / vis分光光度法,溶液磁测量,元素分析和在一种情况下,是X射线晶体学。在铁(III)配合物L(R)Fe(NHAr)(OTf)和L(R)Fe(OtBu)(OTf)的结构中,氮和氧的夹角是由空间效应而不是π键引起的。L(R)FeNHAr的酰胺基与弱酸(HCCPh和HOtBu)的反应与碱性氮原子一致,因为酰胺基被末端炔烃和醇质子化,生成游离的H(2)NAr和三配位乙炔化物和醇盐配合物。复杂稳定性的趋势使人们
Synthesis and reactivity of imido niobium complexes containing the functionalized (dichloromethylsilyl)cyclopentadienyl ligand
silyl-η-amido constrained geometry complexes [Nbη5 -C 5H 4 [SiMe(NH tBu)(-η-N tBu)]}(NH tBu)(NtBu)] ( 6 ) and [Nbη5 -C 5H 4 [SiClMe(-η-N tBu)]}(NH tBu)(NtBu)] ( 7 ), whereas addition of one equimolecular amount of LiNH tBu to 5 in C 6 D 6 afforded complex [NbCp NN Cl(NH tBu)(NtBu)] ( 8 ). All of the new complexes were characterized by 1H, 13 C and 29 Si NMR spectroscopy.
摘要通过[NbCl 5]与C 5反应,分离了具有官能化(二氯甲基甲硅烷基)环戊二烯基配体的铌配合物[NbCp Cl Cl 4](Cp Clη5 -C 5 H 4(SiCl 2 Me))(1)。 H 4(SiCl 2 Me)(SiMe 3)。在加入LiNHt Bu之后,配合物1是亚氨基甲硅烷基酰胺衍生物[NbCp N Cl 2(N t Bu)](Cp Nη5 -C 5 H 4 [SiClMe(NH t Bu)])(2)的前体,当与SiCl 3 Me反应时,其随后得到二氯甲硅烷基化合物[NbCp Cl Cl 2(N t Bu)](3)。在配合物2中添加LiNH t Bu得到铌酰胺基配合物[NbCp N Cl(NH t Bu)(N t Bu)](4),随着铌-酰氨基和硅-氯基团的交换而缓慢演化。二氯铌配合物[NbCp NN Cl 2(N t Bu)](Cp NNη5 -C 5 H 4 [SiMe(NH