Far-infrared and Raman spectra of crystalline tetra-alkylammonium trihalogenomercurate(II) salts. Evidence for monomeric or halogen-bridged associated anions depending on the cation
                                
                                    
                                        作者:Roger M. Barr、Michael Goldstein                                    
                                    
                                        DOI:10.1039/dt9760001593
                                    
                                    
                                        日期:——
                                    
                                    made of the far-infrared (20–400 cm–1) and Raman spectra of eight compounds of type [NR4][HgX3](R = Me, Et, Prn, or Bun; X = Cl, Br, or I) and of [SMe3][HgI3] in the solid state. Solution-phase Raman data have also been obtained. For R = Et and X = Cl two crystalline modifications have been identified. The low-temperature α form has vibrational spectra explicable in terms of an essentially monomeric
                                    已经对八种[NR 4 ] [HgX 3 ]类型的化合物的远红外光谱(20–400 cm –1)和拉曼光谱进行了研究(R = Me,Et,Pr n或Bu n; X = Cl,Br或I)和[SMe 3 ] [HgI 3 ]的固态。还获得了溶液相拉曼数据。对于R = Et和X = Cl,已经鉴定了两个晶体修饰。低温α形式的振动光谱可以解释为基本上是单体的阴离子结构,而β形式在71°C以上稳定,显然含有强的卤化物桥基。通过与α-和β-[NEt 4 ] [HgCl3 ]。因此,相关的阴离子结构也存在于[NEt 4 ] [HgX 3 ](X = Br或I),[NPr n 4 ] [HgCl 3 ]和[NBu n 4 ] [HgI 3 ]中。显然,在定性解释振动数据时,可以忽略在[SMe 3 ] [HgI 3 ]和[NMe 4 ] [HgCl 3 ]的晶体结构中发现的弱卤素桥。[NMe 4 ] [HgX