993-50-0Relevant academic research and scientific papers
ORGANOMETALLIC COMPOUNDS AND METHODS FOR THE DEPOSITION OF HIGH PURITY TIN OXIDE
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Paragraph 0098, (2019/02/17)
Disclosed herein are compounds useful for the deposition of high purity tin oxide. Also disclose are methods for the deposition of tin oxide films using such compounds. Such films demonstrate high conformality, high etch selectivity and are optically transparent. Such compounds are those of the Formula as follows R x -Sn-A 4-x wherein: A is selected from the group consisting of (Y a R' z ) and a 3- to 7-membered N- containing heterocyclic group; each R group is independently selected from the group consisting of an alkyl or aryl group having from 1 to 10 carbon atoms; each R' group is independently selected from the group consisting of an alkyl, acyl or aryl group having from 1 to 10 carbon atoms; x is an integer from 0 to 4; a is an integer from 0 to 1; Y is selected from the group consisting of N, O, S, and P; and z is 1 when Y is O, S or when Y is absent and z is 2 when Y is N or P.
The Metalation of N,N,N',N'-Tetramethylethylenediamine (TMEDA)
Koehler, Frank H.,Hertkorn, Norbert,Bluemel, Janet
, p. 2081 - 2082 (2007/10/02)
TMEDA may be metalated with good regioselectivity: tert-BuLi attacks preferably a methyl group whereas a methylene group is deprotonated by n-BuLi/tert-BuOK.Thus, trapping with Me3SnCl and hydrolytic work-up give either 53percent of Me2N2NMe(CH2SnMe3) (2) and 5percent of (Me3Sn)(Me2N)C=CH2 (3) or 3 alone (42percent), respectively. 3 is formed from deprotonated TMEDA by elimination of amide which can be trapped as Me2N(SnMe3) (5); some trans-(Me3Sn)CH=CH(NME2) (4) is also obtained.The structures of the compounds follow mainly from 1H-, 13C-, 15N-, and 119Sn-NMR data.
Organotin intercalation compounds of FeOCl: Synthesis, 57Fe and 119mSn M?ssbauer and infrared spectroscopy, and powder X-ray diffraction studies
Phillips,Herber
, p. 3081 - 3088 (2008/10/08)
Four new organotin intercalates of FeOCl were synthesized and studied by infrared and variable-temperature 57Fe and 119mSn M?ssbauer spectroscopies and by X-ray powder diffraction. These systems were chosen to provide a detailed microscopic spectroscopic examination of both the host and the guest species as well as a comprehensive picture of the guest-host interaction. The neat organotins, 4-(CH3)3Sn(C5H4N) (P1), (CH3)3SnN(CH3)2 (A1), (CH3)2Sn[N(CH3)2]2 (A2), and Sn[N(CH3)2]4 (A4), all show evidence for an increase in tin coordination upon intercalation to form nominally FeOCl(P1)1/7.5 (INP1), FeOCl(A1)1/5.5 (INA1), FeOCl(A2)1/8 (INA2), and FeOCl(A4)1/16 (INA4). The intercalation process is described as a redox process where an electron is first donated to the FeOCl lattice with the corresponding formation of a pyridinium ligand for INP1 and an iminium ligand for INA1, INA2, and INA4, which then enter between the layers of the FeOCl matrix. The intercalated species in INP1 is described as an associated moiety with both four- and five-coordinate tin and an abnormally low charge transfer to the lattice, which is attributed to the large size of the guest. Data for INA1, INA2, and INA4 are interpreted in terms of six-coordinate tin species in which the fifth and sixth sites are lattice chlorines. An additional organic intercalation compound, FeOCl-[(CH3)2N+=CH2] 1/5[Cl-]1/10, was also prepared and studied as a model compound for the intercalation of the organotin amines. 57Fe M?ssbauer relaxation calculations have been used to determine the extent of the charge transfer to the lattice.
