寻找懂英语翻译的!Table1comparessomeimportantdistancesinthemolecules.ConnectorSize.Theresultspermitafairlyaccurateextrapolationtoestimateconnectorsize.Theexpectedradiusofthepyridine-andbipyridine-containingconnectorsi

　　寻找懂英语翻译的!

　　Table1comparessomeimportantdistancesinthe

　　molecules.

　　ConnectorSize.Theresultspermitafairlyaccurate

　　extrapolationtoestimateconnectorsize.Theexpected

　　radiusofthepyridine-andbipyridine-containingconnectors

　　isabout14.3and18.5Å,respectively.However,

　　becauseofthelocationofthebindingsites,theeffective

　　separationofametalsitefromthecenterofthemolecule

　　islargerinthepyridine-terminatedthaninthebipyridine-

　　terminatedstructureandis16.9and15.0Å,respectively.

　　Theresultisimportantfortheestimationofdistances

　　inpotentialmolecularstructuresbuiltwiththeconnectors.

　　Forexample,thebipyridylandbipyrimidineunits

　　complexwelltomercuryatoms15andwearehopingto

　　exploitsuchcomplexationinmolecularconstruction.

　　TheX-raystructuresofthecompoundsalsoprovide

　　additionaldataconcerningtheuseofbicyclo[1.1.1]-

　　pentanemodulesinmolecularrods.Thepresentlyobserved

　　distancesbetweenbridgeheadcarbonatoms(1.87-

　　1.88Å)aresomewhatlongerthantheaverageforallsuch

　　distancesintheCambridgedatabase(1.81Å).14Of

　　course,thiscarbon-carbonbonddistanceislongwhen

　　comparedtothe“parentmodule”,[1.1.1]propellane,

　　whereitisonly1.587Å.53