3839-32-5Relevant academic research and scientific papers
METHOD FOR PRODUCING 14 GROUP METAL LITHIUM COMPOUND
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Paragraph 0054; 0072, (2016/10/31)
PROBLEM TO BE SOLVED: To provide a method for quantitatively producing a group 14 metal lithium compound under a mild condition. SOLUTION: The method for producing a group 14 metal lithium compound represented by formula (4): R4-nMLin comprises reacting a compound represented by formula (1): R4-nMXn and lithium in the presence of a polycyclic aromatic compound represented by formula (2) or formula (3). [In formula (1) and formula (2), R is a hydrocarbon group; M is a metal atom selected from Si, Ge and Sn; X is a halogen atom or R3M- (R and M are the same as mentioned above); and n is 1 or 2] and [R1 is H or a hydrocarbon group; and m is an integer of 0 to 5.] SELECTED DRAWING: None COPYRIGHT: (C)2016,JPOandINPIT
donor-acceptor oligogermanes: Synthesis, structure, and electronic properties
Zaitsev, Kirill V.,Kapranov, Andrey A.,Churakov, Andrei V.,Poleshchuk, Oleg Kh.,Oprunenko, Yuri F.,Tarasevich, Boris N.,Zaitseva, Galina S.,Karlov, Sergey S.
, p. 6500 - 6510 (2013/12/04)
A series of oligogermanes, (Me3Si)3GeGeCl 3, (C6F5)3GeGePh3, (C6F5)3GeGe(p-Tol)3, and (C 6F5)2Ge[Ge(p-Tol)3]2, containing substituents with different electronic properties at neighboring germanium atoms were synthesized. According to X-ray diffraction studies, UV/visible spectroscopy, and quantum chemical calculations, these donor-acceptor oligogermanes are characterized by energies of electronic transitions lower than those for other similar compounds.
Reaction of germanes and digermanes with triflic acid: The route to novel organooligogermanes
Zaitsev, Kirill V.,Kapranov, Andrey A.,Oprunenko, Yuri F.,Churakov, Andrei V.,Howard, Judith A.K.,Tarasevich, Boris N.,Karlov, Sergey S.,Zaitseva, Galina S.
, p. 207 - 213 (2012/03/26)
Novel germanium containing triflates were prepared from the reactions of trifluoromethanesulfonic acid with tetraphenylgermane (1) and digermanes (Ph3GeGeMe3 (4), Ph3GeGePh3 (5)). The improved procedures for synthesis of known organogermanium compounds (Ph4Ge (1), Ph3GeCl (2), Ph3GeGeMe3 (4), Ph3GeGePh3 (5)) were also presented. The crystal structure of Ph3GeOTf (6) and Ph2Ge(OTf)Ge(OTf)Ph 2 (7) was studied by X-ray analysis. In 7 each germanium atom is pentacoordinated due to intramolecular interaction with O atom of the neighboring triflate group.
Experimental evidence and bond characterization of a cyclopropenylgermylene
Tsutsui, Shinobu,Tanaka, Hiromasa,Kwon, Eunsang,Matsumoto, Shigeki,Sakamoto, Kenkichi
, p. 595 - 603 (2007/10/03)
The reduction of p-anisyl(1,2,3-tri-tert-butylcycloprop-2-en-1-yl)dichlorogermane (1) with potassium in the presence of an excess of tert-butyldimethylsilane in benzene under reflux gave p-anisyl(tert-butyldimethylsilyl)(1,2,3-tri-tert-butylcycloprop-2-en-1-yl) germane (4) in 15% yield. The formation of 4 indicates that p-anisyl(1,2,3-tri-tert-butylcycloprop-2-en-1-yl)germylene (2), which is the first example of a (cycloprop-2-en-1-yl)germylene derivative, was generated and trapped by the hydrosilane. The DFT calculations revealed that the cis-2-p-anisyl-1,3,4-tri-tert-butyl-2-germabicyclo[1.1.0]butane-2,4-diyl structure cis-5 is 8.0 kJ/mol more stable than cis-2. The NBO analysis revealed that cis-5 has a 2-germabicyclo[1.1.0]butane diradical character.
Laser Photolysis and CIDEP Studies of the Formation of Phenyl-Substituted Group 4B Element (Silicon, Germanium, and Tin)-Centered Radicals in Direct Photoejection of the Group 4B Element-Centered Anions
Mochida, Kunio,Wakasa, Masanobu,Sakaguchi, Yoshio,Hayashi, Hisaharu
, p. 7942 - 7947 (2007/10/02)
Phenyl-substituted group 4B element-centered radicals generated by the direct photoejection from the group 4B element-centered anions were observed by laser photolysis at room temperature.In order to claify the mechanism of this process, CIDEP study of the photolysis of the group 4B element-centered anions was carried out at 77 and 4.2 K.From the emissive patterns observed for the germyl and stannyl anions after the excitation by a pluse laser, the photoejection reactions were most probably considered to occur from triplet anions.
UEBER POLYGERMANE. XV. DARSTELLUNG VON PHENYLIERTEN TRIGERMANEN IN HMPT
Draeger, Martin,Simon, Dietolf
, p. 183 - 192 (2007/10/02)
The optimum conditions for the synthesis of the trigermanes Ge3Ph8 and Ge3Me2Ph6 according to R2GeCl2 + 2 Ph3GeAk (Ak = Li, K) in HMPT have been determined.The main difficulty is to repress a nucleophilic attack of Ph3Ge- at newly formed Ge-Ge bonds.The mass spectrum of Ge3Me2Ph6 shows rearrangements of the GePh3 and Ph/Me groups.The 13C NMR phenyl signals of di-, tri- and tetra-germanes are nearly identical.Ge3Ph8 and Ge4Ph10 transform to the plastically-crystalline state before melting (ΔH 45.3 and 54.9 kJ mol-1).The crystal structure of Ge3Me2Ph6 has been determined.The molecule has C2 symmetry (Ge-Ge 242.9(1) pm, Ge-Ge-Ge 120.3(1) deg).
Study of the insertion products of manganese in the silicon-hydrogen bond. Nature of the bond and proton exchange in the H-Mn-Si-H system
Colomer,Corriu,Marzin,Vioux
, p. 368 - 373 (2008/10/08)
NMR studies (29Si, 13C, and 1H) on silicon manganese hydrides slow the possibility of a bond interaction between silicon and hydrogen. Evidence is given for a slow intramolecular equilibrium (on the NMR time scale) between the silicon manganese hydride and the deinserted complex (silicon hydride and manganese moiety). In the latter, however, both moieties are associated and a strong ligand is needed to displace the silicon hydride. Chemical reactions show that protonation of the anion [(η5-CH3C5H4)Mn(CO) 2SiPh3]- leads only to the lateral hydride independent of its mode of generation. When the anion is alkylated, only the diagonal isomer is formed, showing that sterically crowded complexes prefer this geometry; thus the short distance observed between silicon and hydrogen does not seen to arise solely from steric hindrance.
