Reactivity Studies of (Phenylethynyl)germylene LGeC≡CPh (L = HC[C(Me)N-2,6-iPr2C6H3]2) toward Pentafluorophenylcopper(I), -silver(I), and -gold(I) Complexes
摘要:
Reactions of (phenylethynyl)germylene LGeC CPh (L = HC[C(Me)N-2,6-iPr(2)C(6)H(3)](2)) with 0.25 equiv of (CuC6F5)(4), 1 equiv of AgC6F5.MeCN, and 1 equiv of AuC6F5 center dot SC4H8, respectively, yielded LGe(Ca CPh)CuC6F5 (1), [(LGeC CPh)(2)Ag](+)[Ag(C6F5)(2)](-) (2), and LGe(C CPh)AuC6F5 (3). Complexes 1-3 were characterized by IR and NMR spectroscopy and X-ray crystallography. Compound 1 shows a bonding pattern of the CuC6F5 entity by both the phenylethynyl C C linkage and the L ligand backbone of the gamma-C atom, while 3 exhibits a bonding mode of the AuC6F5 entity at the germylene center. Compound 2 is an ionic derivative featuring the Ge-Ag donor acceptor bond formed under redistribution of the AgC6F5 entity. Further reactions of 1 with (CuC6F5)4, AgC6F5.MeCN, and AuC6F5 center dot SC4H8 afforded the complexes LGe(CEECPh)(CuC6F5)(MC6F5) (M = Cu (4), Ag (5), Au (6)). Compounds 4-6 were characterized by IR and NMR spectroscopy, and 5 and 6 were further investigated by X-ray crystallography. Compounds 4-6 all show an additional bonding of the respective MC6F5 moiety at the germylene center of 1. These studies reveal a multiple donor reactivity of LGeC CPh. The slightly different Lewis acidic properties of the congeneric pentafluorophenylcopper(I), -silver(I), and -gold(I) complexes as acceptors are thus disclosed.
Transition Metal Complex Promoted Rearrangements. The Effect of the Metal and of the Attached Ligands on the Mode of Cleavage of Methylated Bicyclo[1.1.0]butanes
β-Diketiminate Germylene-Supported Pentafluorophenylcopper(I) and -silver(I) Complexes [LGe(Me)(CuC<sub>6</sub>F<sub>5</sub>)<sub><i>n</i></sub>]<sub>2</sub> (<i>n</i> = 1, 2), LGe[C(SiMe<sub>3</sub>)N<sub>2</sub>]AgC<sub>6</sub>F<sub>5</sub>, and {LGe[C(SiMe<sub>3</sub>)N<sub>2</sub>](AgC<sub>6</sub>F<sub>5</sub>)<sub>2</sub>}<sub>2</sub> (L = HC[C(Me)N-2,6-<i>i</i>Pr<sub>2</sub>C<sub>6</sub>H<sub>3</sub>]<sub>2</sub>): Synthesis and Structural Characterization
作者:Na Zhao、Jinyuan Zhang、Ying Yang、Hongping Zhu、Yan Li、Gang Fu
DOI:10.1021/ic300216m
日期:2012.8.20
of LGeMe (L = HC[C(Me)N-2,6-iPr2C6H3]2) with 0.25 or 0.5 equiv of (CuC6F5)4 gave the products [LGe(Me)CuC6F5]2 (1) and [LGe(Me)(CuC6F5)2]2 (2), respectively. In situ formed 1 reacted with 0.5 equiv of (CuC6F5)4 to give 2 on the basis of NMR (1H and 19F) spectral measurements. Conversely, 2 was converted into 1 by treatment with 2 equiv of LGeMe. Reactions of LGeC(SiMe3)N2 with 1 or 2 equiv of AgC6F5·MeCN
LGeMe(L = HC [C(Me)N-2,6- i Pr 2 C 6 H 3 ] 2)与0.25或0.5当量的(CuC 6 F 5)4反应得到产物[LGe(Me)CuC 6 F 5 ] 2(1)和[LGe(Me)(CuC 6 F 5)2 ] 2(2)。原位形成的1与0.5当量的(CuC 6 F 5)4反应,基于NMR得到2(1H和19 F)频谱测量。相反地,2转化为1与2当量的LGeMe通过治疗。LGeC(SiMe 3)N 2与1或2当量的AgC 6 F 5 ·MeCN的反应产生了相应的化合物LGe [C(SiMe 3)N 2 ] AgC 6 F 5(3)和LGe [C(SiMe 3)N 2 ](AgC 6 F 5)2 } 2(4)。同样,将3转换为4通过用1当量的AgC 6 F 5 ·MeCN处理,通过与2当量的LGeC(SiMe 3)N 2反应将4转化为3。X射线晶体学研究表明,1包含菱形桥接(CuC
Modulation of the Naked‐Eye and Fluorescence Color of a Protonated Boron‐Doped Thiazolothiazole by Anion‐Dependent Hydrogen Bonding
interactions, the strength of which strongly influences the 1 H NMR shift of the NH protons, enabling tuning of both the visible (yellow to red) and fluorescence (green to red) colors of these salts. DFT calculations reveal that the hydrogen bonding of the counteranion or solvent to the protonated nitrogen centers affects the intramolecular TzbTzb-to-CAAC charge transfer character involved in the S0 →S1 transition
A Donor−Acceptor Dyad with a Highly Lewis Acidic Boryl Group
作者:Anand Sundararaman、Resmi Varughese、Haiyan Li、Lev N. Zakharov、Arnold L. Rheingold、Frieder Jäkle
DOI:10.1021/om700520n
日期:2007.12.1
A donor - pi - acceptor dyad with a highly electron-deficient B(C6F5)(2) group as the acceptor has been prepared. 5-Diphenylamino-5'-bis(pentafluorophenyl)boryl-2,2'-bithiophene (3) was fully characterized by multinuclear NMR spectroscopy, mass spectrometry, and X-ray crystallography. The solid-state structure of 3 shows the presence of multiple pi-stacking interactions rather than Lewis acid - base bonding between boron and nitrogen. Cocrystallized benzene molecules are incorporated into a channel-like framework of 3. The electronic structure and photophysical properties were investigated by UV - visible absorption and emission spectroscopy and DFT calculations. The absorption and emission maxima experience a strong bathochromic shift relative to the non-fluorinated analogues, the origin of which has been further examined by DFT calculations.
Reactivity Studies of (Phenylethynyl)germylene LGeC≡CPh (L = HC[C(Me)N-2,6-<i>i</i>Pr<sub>2</sub>C<sub>6</sub>H<sub>3</sub>]<sub>2</sub>) toward Pentafluorophenylcopper(I), -silver(I), and -gold(I) Complexes
作者:Na Zhao、Jinyuan Zhang、Ying Yang、Guifang Chen、Hongping Zhu、Herbert W. Roesky
DOI:10.1021/om300724t
日期:2013.2.11
Reactions of (phenylethynyl)germylene LGeC CPh (L = HC[C(Me)N-2,6-iPr(2)C(6)H(3)](2)) with 0.25 equiv of (CuC6F5)(4), 1 equiv of AgC6F5.MeCN, and 1 equiv of AuC6F5 center dot SC4H8, respectively, yielded LGe(Ca CPh)CuC6F5 (1), [(LGeC CPh)(2)Ag](+)[Ag(C6F5)(2)](-) (2), and LGe(C CPh)AuC6F5 (3). Complexes 1-3 were characterized by IR and NMR spectroscopy and X-ray crystallography. Compound 1 shows a bonding pattern of the CuC6F5 entity by both the phenylethynyl C C linkage and the L ligand backbone of the gamma-C atom, while 3 exhibits a bonding mode of the AuC6F5 entity at the germylene center. Compound 2 is an ionic derivative featuring the Ge-Ag donor acceptor bond formed under redistribution of the AgC6F5 entity. Further reactions of 1 with (CuC6F5)4, AgC6F5.MeCN, and AuC6F5 center dot SC4H8 afforded the complexes LGe(CEECPh)(CuC6F5)(MC6F5) (M = Cu (4), Ag (5), Au (6)). Compounds 4-6 were characterized by IR and NMR spectroscopy, and 5 and 6 were further investigated by X-ray crystallography. Compounds 4-6 all show an additional bonding of the respective MC6F5 moiety at the germylene center of 1. These studies reveal a multiple donor reactivity of LGeC CPh. The slightly different Lewis acidic properties of the congeneric pentafluorophenylcopper(I), -silver(I), and -gold(I) complexes as acceptors are thus disclosed.