[（phen）2Mn2（μ—O）（μ—Ac）2（H2O2）]（ClO4）2·4H2O双核锰？…

MnAc3.2H2O在pH=4.0的HAc-NaAc缓冲溶液中和邻菲罗啉(phen)反应, 制得了双核锰(Ⅲ)合物[(phen)2Mn2(μ-O)(μ-Ac)2 (H2O)2](ClO4)2.H2O, 并进行了红外光谱表征. X射线单晶衍射表明, 该晶体属单斜晶系, 空间群P21/n, 晶胞参数: a=1.025 28(5) nm, b=1.792 75(9) nm, c=1.984 14(10) nm, β=94.843 0(10)°, V=3.634 0(3) nm3, Z=4, Dc=1.669 g.cm-3. 紫外可见光谱在480 nm处有一个吸收峰. 循环伏安实验说明, 此配合物在乙腈溶液中经历了一个半可逆的一电子氧化还原过程.     

新型六核钼原子簇化合物{[Mo3（μ3—S）（μ—S2）2（dtp）3]—（μ3—S）（η…

［Ｍｏ３（μ３－Ｏ）（μ－Ｓ）３（μ－ＯＡｃ（ｄｔｐ）３（ｐｙ）］和［Ｍｏ３（μ－Ｓ）３（μ－ＯＡｃ（ｄｔｐ）３－（ｐｙ）］（ｄｔｐ＝Ｓ２Ｐ（ＯＣ２Ｈ５）２＾－）族合物分别与金属化合物ＢｉＩ３和ＳｂＢｒ３进行原子簇反应均能获得意外产物｛［Ｍｏ３（μ３－Ｓ）（μ－Ｓ２）２（ｄｔｐ）３］（μ３－Ｓ）（η＾３－Ｓ２）［Ｍｏ２（μ３－Ｓ）（μ－Ｓ）３（μ－ＯＡｃ）（ｄｔｐ）２］｝六核钼簇。其结构实际上是由     

含低价钼的双核化合物(Et_4N)_2[(CO)_4Mo(μ-S)_2MOS_2]和(Et_4N)_2[(CO)_4Mo(μ-S)_2WS_2]的合成及晶体结构

用新方法合成并测定了含Mo(0)的双核化合物(Et_4N)_2[(CO)_4Mo(μ-S)_2MOS_2](Ⅰ)和(Et_4N)_2[(CO)_4Mo(μ-S)_2WS_2](Ⅱ)的晶体结构.Ⅰ和Ⅱ空间群均为Pbcm,Ⅰ的a=1.8403(2)nm,b=1.1963(1)nm,c=1.3482(1)nm,Z=4,R=0.042;Ⅱ的a=1.8453(2)nm,b=1.2004(2)nm,c=1.3494(3)nm,Z=4,R=0.032,Ⅰ和Ⅱ的阴离子均为以Mo(0)为中心的八面体和以Mo(Ⅵ)(或W)为中心的四面体共边且以μ-S连接,Mo(μ-S)2M(M=Mo,W)共平面.其中Mo—Mo键距为0.2992(2)nm,Mo—W为0.30330(8)nm,并发现其Fourier IR中Mo(0)-Sb键的v=424.3 cm~-1。     

低价双核Mo—S—CO簇合物的质谱研究

本文报道了二个低价钼簇合物的快原子轰击(FAB)和电子轰击(EI)质谱:(Et_4N)_2[Mo_2(CO)_8(μ-SPh)_2]的FAB和FAB—NI谱及Mo_2(CO)_8(μ-SPh)_2的FAB和EI谱。分别获得它们的完整的配位阳离子和阴离子峰。这类簇合物的大致裂断解途径可能是首先脱CO、然后脱C_6H_5—,在EI—MS谱中观察到双金属离子裂解为单金属碎片离子的反应。文中探讨了质谱条件下标题簇合物的氧化还原反应。研究结果同时表明,Mo价态明显影响碎片离子峰的相对丰度和Mo对配位体CO、—SPh、—S的络合能力。另外,还报道了Mo_2(CO)_6(μ-SPh)_2(CH_3CN)_2的FAB—MS和EIMS谱。     

具有链结构的新颖三核簇合物Mo3S4（μ—CH3C6H4SO3）[S2P（OC2H5）2…

三核钼簇Ｍｏ３Ｓ４（ｄｔｐ）４．ＨＯ２１（ｄｔｐ＝Ｓ２Ｐ（ＯＣ２Ｈ５）２）和对甲基苯磺酸反应，以Ｃ２Ｈ５ＯＨ做为介质，在ＣｄＣｌ２和ＰＰｈ３参预下获得新颖的三核簇合物Ｍｏ（μ３－Ｓ）（μ－Ｓ）３－（μ－ＣＨ３Ｃ６Ｈ４ＳＯ３）（ｄｔｐ）．（Ｃ２Ｈ５ＯＨ）２．本文报导化合物２的晶体结构、红外光谱、紫外光谱研究结果。簇合物的分子结构存在一个非络合物的对甲基苯左侧酸基和两个Ｍｏ的桥式络合，颇为罕见。而簇分     

CRYSTAL STRUCTURES OF [Bu4N]2[M2Ag3（ μ3—S）2（μ—S）4S2Et2dtc]（M=W,Mo）

<正> The title compounds were prepared from the reation of (NH4)2MS4 (M=W,Mo),AgNO3,NadtcEt2 and Et4NBr in CH3CN-H2O solution. The isomorphous compounds [Bu4N]2[W2Ag3S8Et2du] ( I ) and [Bu4N]2[Mo2Ag3S8Et2dtc] (Ⅱ) crystallize in triclinic space qroup Pi with the following crystal parameters:α=13. 043(4),b = 21. 640(6),c=10. 757(6)A ,α=95. 09(5),β = 91. 90(4),γ = 98. 57(3)°,Z = 2,V = 2987A3,Dc=1. 76g/cm3 for I 5;a= 12. 989(2) ,b=21. 574 (9) ,c= 10. 7/1(1) A .α= 95. 06(7), β=91. 61(4), γ=98. 52(2)°, Z = 2,V = 2961 A3.Dc= 1. 58g/cm3 for Ⅱ . The final R and Rw values are 0. 061 and 0. 072 for Ⅰ ,and 0. 062 and 0. 076 for Ⅱ The M2Ag3 (M = W, Mo) unit in anion M2Ag3S8Et2dtc forms a five-membered ring.     

STRUCTURE OF [Et4N]2[Mo2（CO）8（SCH2C6H4CH2SH）]

<正> Mr =1015.05, P21/c, a= 10.912(4), b= 12.088(3), c= 18.807(8) A.β=103.57(3)° ,V= 2411.4 A3, Z = 2, DC = 1.40 g/cm3.λ(MoKα)= 0.71073 A, μ=7.2 cm-1,F(000)=1048.Room temperature, final R=0.069, Rw=0.091. The geometry around the Mo atom is a distorted octahedron. The equatorial Mo-C distances are shorter than the axial ones. The Mo...Mo distance is 3.949A.     

Reaction of Molybdenum Hexa-carbonyl with Mercapto-pyridine （PySH） or Mercapto-pyridine Oxide （PyS→O） and Crystal Structure of [Et4N][Mo2（PyS）3（CO）5]

Introduction Mercapto-pyridine, C5H4NS-(PyS), containing two active atoms, S and N, is a bidentate ligand, which may act as a 3-electron donor or a 5-electron donor and may be a bridging ligand to link two metal atoms to form polynuclear metal clusters or a chelating agent to coor-dinate to a metal atom by S and N atoms. So the mer-capto-pyridine is a very important reagent and its reac-tion with metal compound is very useful for simulating the active center in metal enzymes and syntheses …     

The Molybdenum（0）Complex [Et4N]2[Mo2（CO）6（pys）2]（pys=Pyrindine—2—thiol

The title compound tetraethylammonium hexacarbonylbis(μ-pyridine-2-thiolato-S∶S) dimolybdenum [Et4N]2[Mo2(CO)6(pys)2] crystallizes in the monoclinic, space group, P21/c with a=13.217(2), b=21.648(2), c=27.193(6)(), β=82.52(2)°, V=7714.6()3, Z=8, Mr=840.77, Dc=1.45 g/cm3, μ=7.8 cm-1, R=0.038 and Rw=0.040 for 6082 reflections with I≥3σ(I). X-ray crystal structure study reveals that the asymmetric unit of the title compound is comprised of two independent formulations of the molecular formula. Each dianion has approximate C2 symmetry and the dimetallic Mo2S2 core adopts a "butterfly" conformation with a dihedral angle between the halves of 139.3(1)° for the first independent anion and 142.8(1)° for the second one. The two pyridine rings lie on the same side of the molecule in a cis arrangement and the Mo...Mo separations are 3.76(1) and 3.838(1)().     

STRUCTURE OF {Mo4S4（μ—OAc）2[S2P（OC2H5）2]4H}

<正> {Mo4S4(μ-OAc)2(dtp)4H}3,(dtp=S2P(OEt)2),Mr=1371.60,Or-thorhombic, space group Pcab, a = 18. 90 (2) ,b = 21. 678 (4 ) , c = 24. 491 (4 ) A , V = 10031(7)A3,Z=8,Dc=1.818g/cm-3,F(000)=5464,λ(MoKa)=0.71073A,finalR= 0. 069 for 3738 independent reflections. This is a successful example of the formation of [Mo4S4]5+ from[3+1] reaction mode. The results of the structure determination indicate that the configuration of the title compound exhibits a tetranuclear cubane-type core [Mo4S4]5+ with six Mo - Mo distances in the range 2. 685~2. 969A and is very similar to that of the previously characterized compound {Mo4S4(μ-OAc)2(dtp)4}2, [Mo4S4]6+, which was obtained directly by the reaction of MoCl3·3H2O with dtp. Some notable differences, however, can be found when six Mo - Mo bond distances and bonding parameters of the four terminal bidentate ligands (dtp) are compared between these two compounds , That can be attributed to the difference in the oxidation state of these two clusters .