将1摩尔的氧化镱和约12摩尔的溴化铵充分混合,然后在300℃下进行反应。待反应完全后,通过真空泵抽成负压,并加热至300℃以除去溴化铵,从而获得纯三溴化镱。
合成制备方法将1摩尔的氧化镱和约12摩尔的溴化铵充分混合,在300℃下进行反应。待反应完全后,使用真空泵抽成负压,并同时加热至300℃以除去溴化铵,从而获得纯三溴化镱。
用途简介暂无相关描述。
Room-temperature single-crystal X-ray structural characterizations are recorded for hydrated lan- thanoid(III) bromide/2,2′:6′,2″-terpyridine (tpy) (1 : 1) complexes, showing all to be ionic and of the form [(tpy)Ln(OH2)x]Br3.yH2O, where x and y are 6 and 1 for the isomorphous series Ln = La(-)Er (and intermediate members, by presumption), and 5 and various values for Ln = Tm, Yb, Lu. Crystals of [(tpy)Ln(OH2)6]Br3.H2O are monoclinic, P 21/c, a ≈ 8·5, b ≈ 18, c ≈ 16·3 Å, β ≈ 108°, Z = 4; for Ln = La, Er, conventional R values on |F| were 0·048, 0·080 for No 4027, 1347 ‘observed’ (I > 3σ(I)) diffractometer reflections respectively. The complex [(tpy)Tm(OH2)5]Br3.H2O is monoclinic, P 21/c, a 8·506(4), b 17·376(1), c 15·951(6) Å, β 106·87(3)°, Z = 4, (quasi-)isomorphous with the Ln = La-Er array, R 0·065 for No 2067. [(tpy)Yb(OH2)5]Br3.4H2O is triclinic, P 1, a 11·902(2), b 11·639(3), c 9·831(2) Å, α 98·92(2), β 106·84(2), γ 92·42(2)°, Z = 2, R 0·062 for No 3422, while [(tpy)Lu(OH2)5]Br3.H2O is monoclinic, P 21/n, a 13·635(8), b 9·022(5), c 19·03(1) Å, β 99·02(5)°, Z = 4, R 0·043 for No 3139. Despite a common N3LnO5 coordination sphere in the last three compounds, subtle differences are found in stereochemistry; in the N3LnO6 array, one of the outer water molecules becomes progressively detached as the lanthanoid radius contracts. Some tendency is found toward the end of the lanthanoid series toward the formation of di(hydroxy-bridged) neutral dimers, Ln(OH)Br2/tpy/H2O(1 : 1 : 8)(×2), [(tpy)(H2O)3Ln(µ-OH)2Ln(OH2)3(tpy)]Br4.10H2O, monoclinic, C 2/c, a ≈ 19·5, b ≈ 14·5, c ≈ 17·1 Å, β ≈ 92°, Z = 4 dimers, thus far defined by full determinations for the extrema Lu = Er, Lu (and Y), R 0·055, 0·043, (0·047) for No 3141, 4591, (2991) respectively; the dimer is disposed about a crystallographic 2 -axis. An Ln = Dy example, seemingly isomorphous, has also been characterized by cell determination.