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t h n t tlic perniunent nicsonicric displnccment due to ortho-parcr activation is much larger tliiin tlic displricemerit of opposite sign produccd by nieln nctivntion.
.Dr. R. J. \'. Lc FGvrc said that II fcw yciirs ago Iic W R S striick by tlic fiict t h t ii minority of orgiinic liquids csistcd for wliich tlic ratio p2 #,,,/pt wns less thnn unity (s.o., Cl-ICI,, Et,O, and Et$ for wliicli tlic gris : liquid ratios were :qq):irciitly 23 : 24 ; '27 : 33 ; 14 : %I), rind thiit tlicsc wcrc :ill substances Iiiiving negntive I h r r constiints. The iiviiilriblc nicnsnrenicnts in tlic litcrnturc were, liowcvcr, sc:inty and ofteii in contrndiction witti one nnothcr. Accortlingly, JIr. litissell and the speiikcr tlccided to ninkc n direct and riccurritc conipnrison of thc nioiiicnts of conipoiin~ls bclonging to the ncgativc Kcrr constrint clriss in tlic ~: I S C O U S , liquid, iind dissolwl states. lliis work wris no\v in progress and whcrc Prof. Sngdcn nntl t h y had csninincd t,hc sanic nintcrials ngreciiicnt bct.wccn the fignrcs o1)tninccl was sntisfrictory.
JIr. 1' . liusscll snid tlint as rcgiirds tlie n i ~n ~n r ~n i ~n t ~ of tlic wponrs, they Iiiid ~iindc tliesc using :in il])piiriit~~~ \diicli, t h y hoped, :ivoitls ninny dis~idv:intngcs of prcvious ~i l ) ~) i i r : i t ~~ but rctaiiis tlie siniplicity of tlic rcsonniicc iiictliod. Tlic results iirc shortly to bc prcsentcd for piiLlication. Por csiiniplc, tlic nionicnts for Nl,, JleNlI,, JIc2Nll iintl Jle,N :irc I * ' J 4 , 1-25, 1-02, nut1 0.61. l'lic polarisations tire rcprotluci1)lc to 0.2 cc. lh. L. 15. Sutton nlso spolic.
Ikplying, Prof. Sugden sriid tliiit lie wiis not so optiniistic 11s :Dr. Sutton about the vnliic of solution tnciisiircniciits for tlctcrniining vnlcncy iinglcs. For tliplicnyl ctlicr the solution results givc l.loo for the viilcncy iiiiglc, whilst clcct,ron tlilfriict,ion nicthocls with ~~~~'-tli-iotlotiipllcllyl ctlier give I IS". I-lc Iiopetl tliiit I>r. Suttoii would I)c SII~CCSSI'III in ciiIc1IIiit.ing ttic contrihntion of tlic csoitctl states t,o tlic dipole nionicnt.
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