首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 15 毫秒
1.
1 INTRODUCTIONThefirstpolyhedralruthenaboraneisstructurallytypifiedbythecompound〔(PPh3)2RuB10H8(OEt)2〕in1984〔1〕,whichisobtainedin40%yieldbythereactionoftheclosodecaboraneanionB10H102-with〔RuCl2(PPh3)3〕inethanol/chloroformsolution.Researchershavesy…  相似文献   

2.
1 INTRODUCTIONBiscyclopentadienyllanthanidechloridesforallthelanthanideelementshavebeensynthesizedandstructurallycharacterized〔1〕.Tert-butylcyclopentadienylisasuitableligandforpreparationoflanthanocenechlorides.Thesynthesesandmolecu-larstructuresof〔(…  相似文献   

3.
1INTRODUCTIONTheNi(dmit)2moleculesgiverisetoanumberofmolecularconductors〔1,2〕inadditiontosuperconductors〔3,4〕.Themultysulfurf...  相似文献   

4.
1 INTRODUCTIONStudiesonMo-S(SR)compoundshavealwaysbeenanactiveresearchareabe-causeoftheexistenceandimportanceofMo-S(SR)bondinginmolybdenumen-zymes〔1〕inbiologicalsystemandthepotentialapplicationtomaterialsandcatalyst〔2〕.Inrecentyears,weareinterestedin…  相似文献   

5.
1 INTRODUCTIONSulfoxideisknowntoformcoordinationcompoundswithLanthanide(Ⅲ)andtheirsyntheses,propertiesandvariousphysicalcharacteristicshavebeenreport-ed〔1~9〕.However,therearesomanydifficultyinpreparingthekindoflanthanidecomplexesbecausetheanionsuseda…  相似文献   

6.
1 INTRODUCTIONWehaveshownaninterestinexopolyhedralcyclizationofmetalligandstocluster.AseriesofmetallaboranecompoundscontainingfivememberedringssuchasM-O-C-O-BandM-S-C-O-Baresynthesizedandcharacterized.Thegroupsofcyclizationincludeacetate〔1〕,benzoat…  相似文献   

7.
1INTRODUCTIONTrinuclearoxo centeredmetalcarboxylateasembliesofthegeneralcomposition〔M3(μ3 O)(μ2 O2CR)6(L)3〕n+havebenofintense...  相似文献   

8.
1 INTRODUCTIONInoureffortstodevelopthelow-valenceMo-SRcompounds,wehavefoundanMo(0)-compound,〔Mo2(SR)2(CO)8〕2-,whichisobtainedfromthereactionofMo(CO)6withRS-inhighyield,possessesaninterestingtwo-electrontransferproperty.Numerouskindsofdinuclearmolybde…  相似文献   

9.
标题化合物由La(NO3)3·nH2O,1,10-邻菲罗啉(phen)和乙酰丙酮等在无水乙醇和水的混合溶剂中合成并用IR谱和X射线结构分析进行表征。晶体学数据如下:C24 H21LaN8O14,Mr= 784.40, 三斜, P1, a= 7.124(1), b= 11.047(2), c= 19.393(4), α= 81.10(3), β= 87.79(3), γ= 74.36(3)°, V= 1452.0(5)3, Z= 2, Dc=1.794g/cm 3, F(000)= 780, μ(MoKα)= 1.557m m - 1。化合物由阳离子〔phenH〕+ 和配合阴离子〔La(NO3)4(H2O)(phen)〕- 及一个结晶水分子组成。配合阴离子中以La原子为中心,周围被2 个N原子(来自phen)和9 个O原子(来自NO3- 和H2O)所占据,构成较为罕见的11 配位。晶胞中两两阳离子〔phenH〕+ 及两两配体phen 平面之间均相互平行堆积,并有多种类型的氢键存在,这些都可以降低能量,有利于化合物在晶体中的堆积。  相似文献   

10.
1INTRODUCTIONInrecentyears,ithasfoundthatbenzothia/diazepinetricyclicderivativesarepo tentialpharmaceuticalagents〔12〕.Thus,we...  相似文献   

11.
1 INTRODUCTIONItwasreportedthattheheterocycliccompoundscontaining1,2,4triazolo〔1,5a〕pyrimidinyldisplayedpotentialbiologicalactivities〔1,2〕.However,theherbicidalactivityofthe(thio)etherderivativesof1,2,4triazolo〔1,5a〕pyrimidinewasrarelyreported〔…  相似文献   

12.
1INTRODUCTIONBenzodiazepinecompoundsareimportantpharmaceuticalagents〔1,2〕.Recentlyithasbeenfoundthatbenzodiazepinetricyclicde...  相似文献   

13.
1INTRODUCTIONOrganolanthanidecomplexesinvolvingbothcyclopentadienylandβ diketonatochelateligandshavebeensynthesized〔1 4〕,ando...  相似文献   

14.
1 INTRODUCTIONDimolybdenumalkynecomplexes〔Mo2(μR1C≡CR2)(CO)4(η5C5H5)2〕canreactwithavarietyofreagentssuchasphosphines,thiols,elementalsulfur,Ru3(CO)12andCo2(CO)8〔1-4〕.Intheproductsthealkyneligandisusuallyretained.Sometimes,alkynescissionoccurs.Being…  相似文献   

15.
INTRODUCTIONNaftopidil,RS 1 (2 methoxyphenyl) 4 〔3 (1 naphthyloxy) 2 hydroxypropyl〕 piperazine,isanovelantihypertensivedrugcu...  相似文献   

16.
CrystalStructureofTris-(dimethoxyphosphato)Lanthanum(Ⅲ)CoordinationPolymer{La〔PO_2(OCH_3)_2〕_3}_n¥ZengGuang-Fu;GuoXin;WangCui-Y?..  相似文献   

17.
簇合物〔WOS3Cu3(γ-pic)6〕Br(C36H42BrON6S3Cu3W, Mr= 1125.34) 属于三方晶系,空间群为P3,晶胞参数为:a= 12.264(5), c= 15.905(8) , γ= 120.00°, V=2071(2)3, μ(MoKα)= 5.490m m - 1, Z= 2, Dc= 1.804g/cm 3, F(000)= 1104 , R= 0.052 , w R= 0.053. 可观察衍射点1901 (I≥2σ(I))。该簇合物的分子由游离的阴离子Br- 和簇阳离子〔WOS3Cu3(γ-pic)6〕+ 构成。阳离子中的W 原子、S原子和Cu原子构成1 个巢状骨架结构,且该结构中存在一个通过W 和O原子的C3 轴。  相似文献   

18.
1 INTRODUCTIONCu(I)complexeswithphosphineandarsineligandsarewellknown〔1〕.ForCuphosphinecomplexes,theCu∶ligandratiovariesfrom1∶1to1∶4andcoordinationgeometryofCu(I)rangesfromlineartotrigonal,thentotetrahedralextremes;forexample,the1∶2adductsCu(PPh3)…  相似文献   

19.
Quasi-aromaticityinClusterChemistryⅡ.LocalizedMolecularOrbitalStudieson〔Co_6(CO)_(14)〕~(4-)and〔Ni_2Co_4(CO)_(14)〕~(2-)ClusterAni?..  相似文献   

20.
CHEN Zhi  |Rong  a  LI Jian  |Hui  b  LI Hong  |Jun  a a   《结构化学》2000,(1)
1 INTRODUCTIONInrecentyears,theziniccompoundscontainingsulfurandnitrogenattractmoreandmoreattentionbecauseoftheirdeeprelationshipwithbio-inorganicchemistry〔1〕.Zinicsulfideplaysanimportantroleduetoitssignificantinvolvementinthestudyofthephosphors,semi…  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号