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简介:ThereactionofNdCl3withlithiummethylnaphthalenein1:2moleratioinTHFgeneratesblackpowder.Thepowderreactswithcyclooctatetraene(COT)inTHFtoformthetitlecomplex.[Li(THF)4Nd(C8H8)2]·2THFcrystallizesinthemonoclinicspacegroupP2/cwithunit-celldimensionsa=1.7858(7)nm,h=1.3243(4)nm,c=1.8086(6)nm.β=106.52(4)°,V=4.10nm3andDc=1.268g/cm3forZ=4.F(000)=1660,R=0.0774,Rn=0.0733.Thecomplexconsistsofdiscreteion-pairandtwoTHFmoleculesadduct.Intheanion,theneodymiumatomiscoordinatedbytwoCOTrings.ThestructureofthecationshowsthatthelithiumatomisattachedwithTHFmoleculesonly.
简介:Thispaperintroducestheprocessflow,technicalparametersandrelevantfeaturesofBaosteel'sNo.8airseparationunit(ASU)withacapacityof60000m3/h.Itsummarizesthecommissioningwork,whichincludestheadjustmentoftheaircompressor,thesystem'snakedcooling,theprecoolingsystemandtheoperationadjustment.Italsoprovidesdetailedanalysesonsomefailureswhichoccurredinthecommissioning.Throughthemodificationofthedesignandtheinterlocks,thetrippingprobabilityoftheaircompressorwasgreatlyreduced.Throughtheheatingofthesystemandthecontrolofthewatercooler'snitrogenflow,theoverproofcontentofcarbondioxideandfluctuationofoxygenflowwereavoided.Nitrogen-blockintheargonsystemwaseliminatedbytheprecisecontroloftheargonrectificationflowandargoncontent.Allthesesolutionshavebeenprovedtobeeffectivebypractice.