Low temperature neutron and X-ray diffraction study of imino(triphenyl)phosphorane1Dedicated to Prof. Ken Wade on the occasion of his 65th birthday with sincere thanks for stimulating and fruitful collaborations in elucidation of the beautiful and complex structures that stem from a unique and extensive chemistry.1
摘要:
The structure of imino(triphenyl)phosphorane, Ph3PNH 1 has been determined by low-temperature X-ray and neutron diffraction. This dual study is the first such for an iminophosphorane. From the neutron diffraction data, the P-N bond length is 1.582(2) Angstrom and the P-N-H angle is 115.0(2)degrees. (C) 1998 Elsevier Science S.A.
Reactions of the phosphorus ylide Ph3PNC(NPh)Ph (3), conveniently prepared in high yield from Ph3PNLi and ClC(NPh)Ph, with [Ni(COD)2] in the presence of a tertiary phosphine yielded the complexes [NiPhPh2PN=C(N¯Ph)Ph}NPh[=CPh(N=PPh3)]}] (5) and [NiPhPh2PN=C(N¯Ph)Ph}(PR3)] (PR3 = PMe3 (6a), PMe2Ph (6b), PMePh2 (6c)) which result from oxidative addition of a PPh bond to the Ni(0) centre. When PTol3
Solution NMR structural study of a mixed aggregate of N-lithium triphenylphosphazene and lithium bromide
作者:Ignacio Fernández、Matthew G. Davidson、Richard D. Price、Fernando López Ortiz
DOI:10.1039/b821424g
日期:——
The toluene solution structure of an N-lithio(triphenyl)phosphazene (Ph(3)PNLi) mixed aggregate with lithiumbromide (LiBr), 5, has been elucidated for the first time based on multinuclear magnetic resonance measurements ((1)H, (6)Li, (7)Li, (13)C and (31)P). The structure consist of two dimers [Li(mu-Z)](2) (Z= Br, NPR(3)) linked through LiX (X= N, Br) bridges. This arrangement is a cubane-like structure
Low temperature neutron and X-ray diffraction study of imino(triphenyl)phosphorane1Dedicated to Prof. Ken Wade on the occasion of his 65th birthday with sincere thanks for stimulating and fruitful collaborations in elucidation of the beautiful and complex structures that stem from a unique and extensive chemistry.1
作者:Matthew G Davidson、Andrés E Goeta、Judith A.K Howard、Christian W Lehmann、Garry M McIntyre、Richard D Price
DOI:10.1016/s0022-328x(97)00551-2
日期:1998.1
The structure of imino(triphenyl)phosphorane, Ph3PNH 1 has been determined by low-temperature X-ray and neutron diffraction. This dual study is the first such for an iminophosphorane. From the neutron diffraction data, the P-N bond length is 1.582(2) Angstrom and the P-N-H angle is 115.0(2)degrees. (C) 1998 Elsevier Science S.A.
Halogenation Reactions of Phosphiniminocyclotrithiazenes: Search for New Inorganic Heterocycles
作者:Janarthanan Gopalakrishnan、Ulaganathan Swarnalatha、Sudheendra M. N. Rao
DOI:10.1080/15533174.2015.1066804
日期:2016.9.1
sources (SO2Cl2, PhICl2, Br2, and I2) gave rise to various products. In case of R = Ph, the ring-retained product, while for others, ring-degraded products were obtained. A novel cyclotrithiazene heterocycle, [Ph3PN]2S3N3+I3− containing a tetracoordinated sulfur atom with two phosphinimino substituents was obtained, which was further established by IR, NMR (1H-, 13C-, and 31P-) and elemental analysis
尽管四硫四氮化物的化学方法已经得到很好的开发和研究,但膦酰氨基环三噻嗪的化学方法却不是。对称取代的R 3 PN-S 3 N 3 [R = Ph,OC 4 H 8 N,MeNC 4 H 8 N,和C 5 H 10 N]与卤素和卤素源(SO 2 Cl 2,PhICl 2, Br 2和I 2)产生了各种产物。如果R = Ph,则为环保留的产物,而对于其他化合物,则获得环降解的产物。新型环三噻嗪杂环,[Ph 3PN] 2小号3 Ñ 3 +我3 -含有具有两个取代基phosphinimino获得,其进一步通过IR,NMR建立(一个四配硫原子1 H-,13 C-和31 P-)和元素分析。循环伏安研究表明氧化还原行为以及三碘化物的存在。理论计算清楚地表明最大正电荷在四配位硫原子上的驻留(接近于一)。