Intramolecular cyclization–decyclization of new sterically hindered diiminophenol. Synthesis and coordination abilities
作者:Gleb A. Abakumov、Nikolay O. Druzhkov、Elena N. Egorova、Tatiana N. Kocherova、Andrey S. Shavyrin、Anton V. Cherkasov
DOI:10.1039/c3ra47669c
日期:——
The novel benzoxazole I undergoes a fast intramolecular decyclization and demonstrates either a neutral or anionic coordination type in cadmium complexes.
小说苯并噁唑I在镉配合物中发生快速的分子内环化反应,并表现出中性或阴离子配位类型。
Imino-amide catalyst compositions for the polymerization of olefins
申请人:Murray Rex Eugene
公开号:US06919467B2
公开(公告)日:2005-07-19
The present invention provides a catalyst precursor and catalyst system comprising the precursor, an embodiment of the precursor is selected from the following structures:
wherein T is a bridging group; M is selected from Groups 3 to 7 atoms, and the Lanthanide series of atoms the Periodic Table of the Elements; Z is a coordination ligand; each L is a monovalent, bivalent, or trivalent anionic ligand; X and Y are each independently selected from nitrogen, oxygen, sulfur, and phosphorus; R is a non-bulky substituent that has relatively low steric hindrance with respect to X; and R′ is a bulky substituent that is sterically hindering with respect to Y.
Synthesis and structures of mono- and di-nuclear aluminium and zinc complexes bearing α-diimine and related ligands, and their use in the ring opening polymerization of cyclic esters
affords [LiPr-N2-ArCH2Ar-N2(ZnCl2)2] (8). The molecular structures of complexes 1-8 are reported. Preliminary results of the ability of 1-8, along with the previously reported metal-metal bonded complex [ArN[double bond, length as m-dash]C(Me)C(Me)[double bond, length as m-dash]NAr]Al(THF)}2 (9), to act as catalysts for the ringopeningpolymerization (ROP) of the cyclic esters ε-caprolactone (ε-CL), δ-valerolactone
Hydrogen Bonding Behavior of Amide-Functionalized α-Diimine Palladium Complexes
作者:Feng Zhai、Richard F. Jordan
DOI:10.1021/om500978n
日期:2014.12.22
amide-functionalized arylimine unit. 5d, 6d, and 7d exhibit intramolecular N–H···Cl and N–H···O hydrogenbonding interactions involving the amide NH units. The reactions of 5a,a′, 5c-anti, and 5d,d′ with AgSbF6 in the presence of pyrazole yield the corresponding (α-diimine)PdMe(pz)+SbF6– salts (8a,c,d; pz = pyrazole), which exhibit an intramolecularhydrogenbond between the amide oxygen and the pyrazole NH unit
描述了在N-芳基环上带有酰胺取代基的一类(N,N'-二芳基-α-二亚胺)Pd络合物。涉及酰胺基团的氢键相互作用影响这些化合物的结构,异构体分布和配体配位行为。酰胺官能化的α-二亚胺配体(2,6- i Pr 2 -Ph)N═CMeCMe═N(2-C(= O)NMe 2 -6- i Pr-Ph)(4a),(2,6 -我镨2 -Ph)N═CMeCMe═N(2,6-(C(= O)NME 2)2 -Ph)(图4b),和(2-C(= O)NME 2 -6-我镨-Ph)N═CMeCMe═N(2-C(═O)NMe 2 -6- i通过2,3-丁二酮与适当的苯胺的缩合反应可制得Pr-Ph)(4c)。尝试制备(2,6- i Pr 2 -Ph)N═CMeCMe═N(2-C(= O)NHMe-6- i Pr-Ph)(4d)得到相应的1,2-二氢喹唑啉酮衍生物4d由酰胺氮在近端亚胺碳上的亲核攻击而形成的'。4a和4b
Ethylene Polymerization by Xanthene-Bridged Dinuclear α-Diimine Ni<sup>II</sup>
Complexes
ethylene polymerization properties of a series of xanthene‐bridgeddinuclear α‐diimine NiII complexes are described. The dinucleating α‐diimine ligands were prepared from the xanthene‐bridged di‐anilines, which were synthesized and isolated on the multigram scale without using column chromatography. The di‐anilines could potentially be used to prepare various dinucleating imine‐containing olefin polymerization