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An ab initio study on coinage atom-inserted cyanide/isocyanide: XMCN/XMNC (M = coinage atoms; X = halogen)

机译:从头开始研究硬币原子插入的氰化物/异氰化物:XMCN / XMNC(M =硬币原子; X =卤素)

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The coinage atom-inserted cyanide/isocyanide compounds, XMCN and XMNC (X = halogens) formed by the insertion of a coinage atom into the X–C(N) bonds of XCN (or XNC), were investigated by ab initio methods. XMCN was predicted to be more stable than XMNC, which is different from the case of XUCN/XUNC reported previously. Based on the analyses on the ionization dissociation pathways, the M–C (or M–N) bond is more easily broken than the X–M bond. Moreover, the order of the M–C (or M–N) bond energy in XMCN (or XMNC) is XAuCN (XAuNC) > XCuCN (XCuNC) > XAgCN (XAgNC). The shift characters of v _(C–N) in XMCN (or XMNC) with respect to the concerning precursor can be used to identified XMCN and XMNC experimentally. The results of charge decomposition analysis (CDA) and atoms-in-molecule (AIM) illustrate that the X–M and M–C(N) bond behaves as a coordination bond, while the C–N bond is a typical polar covalent bond. The higher thermodynamic stability of XMCN is the result of the –CN group having better coordination ability than the –NC group.
机译:通过从头算方法研究了将造币原子插入的氰化物/异氰化物XMCN和XMNC(X =卤素),是通过将造币原子插入XCN(或XNC)的X–C(N)键而形成的。预测XMCN比XMNC更稳定,这与之前报道的XUCN / XUNC情况不同。根据对电离解离途径的分析,M–C(或M–N)键比X–M键更容易断裂。此外,XMCN(或XMNC)中的M–C(或M–N)键能的顺序为XAuCN(XAuNC)> XCuCN(XCuNC)> XAgCN(XAgNC)。 XMCN(或XMNC)中的v _(C–N)相对于相关前体的移动特性可用于通过实验识别XMCN和XMNC。电荷分解分析(CDA)和分子内原子(AIM)的结果表明,X–M和M–C(N)键表现为配位键,而C–N键是典型的极性共价键。 XMCN更高的热力学稳定性是–CN组比–NC组具有更好的配位能力的结果。

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