Complex nitrile

The C-coordinated thiazolium complexes are the result of the proton-induced cyclization reactions (980M513). Thus, complex 1 on protonation with tetrafiuoroboric acid yields the C-coordinated thiazolium structure 2. In turn, the nitrile complex 3 under these conditions is transformed to the thiazolium cationic species 4. Protonation of the amido complex 5 with tetrafiuoroboric acid also results in a cyclization but it proceeds differently. The amino group of the CONH2 moiety is lost and BF3-framework is coordinated via the carbonyl oxygen in an overall neutral complex 6. 

Nitrile complexes are synthesized by a variety of routes (Figure 2.49). 

Nitrile complexes M(RCN)2C12 [84] are useful starting materials for the synthesis of other complexes (e.g. phosphine complexes section 3.8.3) as the nitrites are easily displaced. Synthesis include... 

Monovalent Nitrile complexes Nitrite complexes Nitrosyl complexes NMR spectra... 

An important contribution to silylium ion chemistry has been made by the group of Muller, who very recently published a series of papers describing the synthesis of intramolecularly stabilized silylium ions as well as silyl-substituted vinyl cations and arenium ions by the classical hydride transfer reactions with PhjC TPEPB in benzene. Thus, the transient 7-silanorbornadien-7-ylium ion 8 was stabilized and isolated in the form of its nitrile complex [8(N=C-CD3)]+ TPFPB (Scheme 2.15), whereas the free 8 was unstable and possibly rearranged at room temperature into the highly reactive [PhSi /tetraphenylnaphthalene] complex. ... 

The kinetics of the reaction is first order in both nitrile complex and azide.909 NaN3 reacts with [Co(tetren)(NCMe)]3+ at pH 5.7 to give the 5-methyltetrazolato complex [Co(tetren)(N4CMe)]2+. The reaction is biphasic, involving the initial rapid formation of the AM-bonded tetrazole followed by the slow linkage isomerization to the N2-bonded complex.907... 

In a study of the hydrolysis of platinum(II)-nitrile complexes to afford the corresponding amides, the first well-characterized examples of platinum(II) complexes that dimerize spontaneously to form weakly bonded Pt-Pt dimers with an unsupported intermetallic bond have been described.166 For example, treatment of cw-[PtCl2(NCBut)2] with excess KOH affords the amide species cw-[PtCl2 HN=C(OH)But 2], which exists as a dimer (49) both in solution and in the solid state, with a Pt-Pt bond length of 3.165(1) A, as determined by X-ray crystallography. Four... 

In the imido systems the n n transition is shifted to lower energy (518 nm) and markedly decreases in intensity. On the other hand, upon substitution of the anionic trans-ligands by acetonitrile the n->-n transition is found at 450 nm, shifting to 525 nm upon protonation. Moreover, the metal-N(nitrido) stretching frequency increases to 1016 cm From a chemical viewpoint it is important that the nitrido-nitrile complex can be... 

The corresponding aldoxime PhCH=N—OSiMe3 reacts with complex 1 to give titanocene nitrile complexes and the titana-diazacyclopentene 86 [46],... 

This procedure is a modification of the method employed by Moureu and Mignonac,3 who first reported the preparation of ketimines via Grignard-nitrile complexes. The use of methanol... 

Nitrile complexes of stannyl cations with a stoichiometry of staimyl cation/nitrile = 1 1 are described in the literature however no structural or spectroscopic data are given. 

As with their trans isomers, treatment of the nitrile complexes cw-[ReCl(NCR)(dppe)2] (R = aryl) with [Et20H][BF4] or TMSCF3SO3 in CH2CI2 leads to the formation of the methylenamide compounds cA-[ReCl NC(E)R (dppe)2] (E = H, TMS) and tra x-[ReCl(NCHR)-(dppe)2]. The products undergo deprotonation by bases such as [NBu4]OH to form the trans isomers of the corresponding nitrile complexes [ReCl(NCR)(dppe)2]. Reactions of cis-[ReCl(NCR)(dppe)2] complexes with [Et30][PFg] result in oxidation and isomerization to afford the rhenium(II) complexes tra 5-[ReCl(NCR)(dppe)2][PF6]. ... 

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