ICCAS OpenIR
Syntheses, structures and reactions of a series of beta-diketiminatoyttrium compounds
Wei, Xuehong1,2; Cheng, Yanxiang1,3; Hitchcock, Peter B.1; Lappert, Michael F.1
2008
Source PublicationDALTON TRANSACTIONS
ISSN1477-9226
Issue38Pages:5235-5246
AbstractThis paper describes the synthesis and selected reactions of a series of crystalline mono(beta-diiminato) yttrium chlorides 3a, 3b, 4a, 4b, 5a, 5b, 5c and 9. The X-ray structure of each has been determined, as well as of [YCl(L(4))(2)] (6), [Y(L(1))(2)OBu(t)] (7) and [Y{CH(SiMe(3))(2)}(thf)(mu-Cl)(2)Li(OEt(2))(2)(mu-Cl)](2) (8). The N, N'-kappa 2-beta-diiminato ligands were [{N(R)C(Me)}(2)CH](-) [R = C(6)H(4)Pr(i)-2 (L(1)); R = C(6)H(4)Bu(t)-2 (L(2)); R = C(6)H(3)Pr(2)(i)-2,6 (L(3))], [{N(SiMe(3))C(Ph)}(2)CH)](-) (L(4)) and [{N(C(6)H(3)Pr(2)(i)-2,6)C(H)}(2)CPh](-) (L(5)). Equivalent portions of Li[L(x)] and YCl(3) in Et(2)O under mild conditions yielded [Y(mu-Cl)(L(x))(mu-Cl)(2)Li(OEt(2))(2)](2) [L(x) = L(1) (3a) or L(2) (3b)] and [Y(mu-Cl)(L(3))(mu-Cl)Li(OEt(2))(2)(mu- Cl)](2) (4a) or its thf (instead of Et(2)O) equivalent 4b. Each of the Li(OEt(2))(2)Cl(2) moieties is bonded in a terminal (3) or bridging (4) mode with respect to the two Y atoms; the difference is attributed to the greater steric demand of L(3) than L(1) or L(2). Under slightly more forcing conditions, YCl(3) and Li(L(2)) (via 3b) gave the lithium-free complex [YCl(2)(L(2))(thf)(2)] (5b). Two isoleptic compounds 5a and 5c (having in place of L(2) in 5b, L(3) and L(5), respectively) were obtained from YCl(3) and an equivalent portion of K[L(3)] and Na[L(5)], respectively; under the same conditions using Na[L(4)], the unexpected product was [YCl(L(4))(2)] (6) (i. e. incorporating only one half of the YCl(3)). A further unusual outcome was in the formation of 8 from 3a and 2 Li[CH(SiMe(3))(2)]. Compound [Y(L(5)){N(H)C(6)H(3)Pr(2)(i)-2,6}(thf)(mu(3)-Cl)(2)K](2)center dot 4Et(2)O (9), obtained from 5c and K[N(H)C(6)H(3)Pr(2)(i)-2,6], is noteworthy among group 3 or lanthanide metal (M) compounds for containing MClKCl (M = Y) moieties.
DOI10.1039/b806451b
Indexed BySCI
Language英语
WOS IDWOS:000259411500017
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/64098
Collection中国科学院化学研究所
Corresponding AuthorLappert, Michael F.
Affiliation1.Univ Sussex, Dept Chem, Brighton BN1 9QJ, E Sussex, England
2.Shanxi Univ, Sch Chem & Chem Engn, Taiyuan 030006, Peoples R China
3.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Wei, Xuehong,Cheng, Yanxiang,Hitchcock, Peter B.,et al. Syntheses, structures and reactions of a series of beta-diketiminatoyttrium compounds[J]. DALTON TRANSACTIONS,2008(38):5235-5246.
APA Wei, Xuehong,Cheng, Yanxiang,Hitchcock, Peter B.,&Lappert, Michael F..(2008).Syntheses, structures and reactions of a series of beta-diketiminatoyttrium compounds.DALTON TRANSACTIONS(38),5235-5246.
MLA Wei, Xuehong,et al."Syntheses, structures and reactions of a series of beta-diketiminatoyttrium compounds".DALTON TRANSACTIONS .38(2008):5235-5246.
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