Cartesian Co-ordinates of Optimised CASSCF Structures in System 1 HT 6 -.016175 -.002190 -.017567 6 -.028873 .013238 1.448670 6 1.008592 .065796 2.322290 6 -1.230673 -.116949 2.266156 6 -.835079 -.120674 3.556730 8 .539821 -.009628 3.618281 6 .782346 .671219 -.867425 6 1.808431 1.676481 -.572755 6 1.807620 2.667401 .354821 6 3.044696 1.842114 -1.330231 6 3.695907 2.899897 -.801925 8 2.954579 3.426147 .237286 1 -.743637 -.660548 -.456687 1 2.060372 .141361 2.203815 1 -2.231178 -.187303 1.904180 1 -1.347179 -.186785 4.484262 1 .654175 .467778 -1.915110 1 1.122458 2.960470 1.110233 1 3.369350 1.232376 -2.142517 1 4.618312 3.379555 -1.016468 CHD 6 -.031534 -.031429 -.053396 6 -.010042 -.059021 1.293080 6 1.303533 -.067892 2.073028 6 -1.057649 .062619 2.303240 6 -.469312 .330360 3.480304 8 .921689 .388805 3.393158 6 1.246763 .038363 -.779858 6 2.350078 .427083 -.112216 6 2.292937 .839509 1.357670 6 3.769046 .425235 -.457559 6 4.471744 .571242 .677417 8 3.662622 .699907 1.806502 1 -.953019 -.031223 -.601213 1 1.717289 -1.063382 2.164734 1 -2.107458 .005139 2.123591 1 -.874315 .517366 4.445805 1 1.285328 -.245190 -1.812980 1 1.999329 1.873599 1.480539 1 4.173741 .276432 -1.433148 1 5.519011 .590435 .861921 TS0 6 -.146461 -.031826 -.125131 6 .036524 -.086803 1.275724 6 1.206942 -.652828 1.919449 6 -.723810 .562100 2.317587 6 -.053355 .401951 3.482113 8 1.098481 -.350736 3.290399 6 .923476 -.253139 -1.007075 6 2.262458 -.229081 -.553795 6 2.674730 .304840 .730580 6 3.421805 -.886225 -1.109433 6 4.435699 -.760195 -.222075 8 4.035366 -.022736 .885130 1 -1.121816 .183764 -.515515 1 1.581719 -1.635957 1.740143 1 -1.628594 1.110369 2.181368 1 -.224532 .752892 4.469923 1 .727336 -.445014 -2.043854 1 2.441932 1.285122 1.082718 1 3.455681 -1.416923 -2.034098 1 5.432047 -1.127911 -.204601 HT* 6 -.227941 .051561 -.210358 6 -.035549 .153729 1.180082 6 1.174361 .575504 1.864102 6 -1.026164 -.042925 2.211281 6 -.444869 .230142 3.403939 8 .868360 .583385 3.255091 6 .754729 .536129 -1.107957 6 1.679249 1.501121 -.715708 6 1.519738 2.272380 .500858 6 3.026277 1.781212 -1.181416 6 3.599946 2.633779 -.309799 8 2.677912 2.983658 .697758 1 -1.111734 -.424124 -.583241 1 2.146655 .181783 1.662916 1 -2.041520 -.327035 2.052562 1 -.830295 .240637 4.394819 1 .789556 .150412 -2.110271 1 .634633 2.772520 .818351 1 3.493423 1.348383 -2.036987 1 4.559649 3.078913 -.228331 C2-HT* 6 -.002479 -.036923 -.009176 6 -.011409 -.060614 1.390373 6 1.176734 -.094269 2.227637 6 -1.127087 .106069 2.297134 6 -.634741 .184935 3.553705 8 .746600 .041718 3.553017 6 1.194027 .200352 -.739843 6 2.294109 .836988 -.153630 6 2.268948 1.524955 1.126907 6 3.681751 .821653 -.564836 6 4.409076 1.427912 .400017 8 3.588352 1.887769 1.421833 1 -.918692 -.207620 -.539974 1 1.997520 -.765240 2.113158 1 -2.151343 .197208 2.014292 1 -1.086929 .351395 4.500203 1 1.255414 -.109522 -1.764825 1 1.549985 2.253368 1.426029 1 4.063652 .368627 -1.451587 1 5.450651 1.591848 .527546 CHD* 6 -.002314 -.114147 -.024730 6 .015363 -.095056 1.407368 6 1.340159 -.106229 2.150901 6 -.991484 .101096 2.332789 6 -.401631 .265807 3.624032 8 .984251 .248330 3.499703 6 1.187147 .127453 -.732373 6 2.370326 .495057 -.013930 6 2.276519 .902126 1.446762 6 3.708150 .406550 -.346983 6 4.489915 .683717 .817388 8 3.640961 .872093 1.903850 1 -.922004 -.283747 -.546907 1 1.816781 -1.075391 2.165285 1 -2.036745 .171014 2.127492 1 -.796630 .646826 4.533796 1 1.220952 .011598 -1.796649 1 1.888248 1.899722 1.590674 1 4.108213 .129549 -1.297153 1 5.513711 .501060 1.035316 TS1 6 -.120643 -.050282 -.097650 6 -.071774 -.139878 1.335582 6 -.515909 -1.327418 2.058291 6 .584384 .689785 2.269745 6 .538578 .063523 3.498704 8 -.139873 -1.113869 3.410038 6 -.196605 -1.242893 -.830802 6 -.109661 -2.520364 -.200909 6 .374783 -2.648583 1.176165 6 -.890121 -3.694212 -.457661 6 -.832244 -4.504401 .634387 8 -.002894 -3.925400 1.605299 1 .030357 .891143 -.582510 1 -1.522009 -1.689852 1.994039 1 1.075138 1.611787 2.056221 1 .961364 .308679 4.442000 1 -.313508 -1.192154 -1.896865 1 1.388387 -2.430694 1.453993 1 -1.455175 -3.885216 -1.342973 1 -1.250686 -5.448523 .878204 CI1 6 -.044543 .005683 .058682 6 -.046246 .079250 1.523441 6 1.249079 .021343 2.324943 6 -1.054790 .518730 2.402027 6 -.516489 .699224 3.650638 8 .849444 .424840 3.657076 6 .829281 1.087119 -.442038 6 2.154218 .918239 .180726 6 2.296487 .983566 1.696530 6 3.356980 .399827 -.325200 6 4.235574 .205774 .716037 8 3.656355 .552219 1.936039 1 -.497439 -.761183 -.530633 1 1.673002 -.970394 2.379513 1 -2.077244 .686993 2.142523 1 -.939043 1.015403 4.573437 1 .452004 2.038268 -.768037 1 2.165127 1.972180 2.111263 1 3.568635 .194131 -1.351784 1 5.240536 -.139975 .752828 CI2 6 -.384606 .007363 .091709 6 -.201689 1.468462 -.018898 6 -.146953 2.302843 1.236729 6 .234740 2.261543 -1.073311 6 .530729 3.533551 -.588931 8 .318203 3.598007 .783940 6 .045356 -.632574 1.189888 6 .783719 .091107 2.237926 6 .849046 1.660257 2.203673 6 1.637766 -.235173 3.296047 6 .734660 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8 3.136885 -.977981 .514367 6 -.670068 1.662671 -.741765 6 -1.605750 .700473 -.443401 6 -1.238911 -.804370 -.529493 6 -2.972973 .696822 .067561 6 -3.326011 -.563792 .368552 8 -2.290041 -1.486423 .121033 1 -.023888 1.595659 1.323780 1 1.773960 -.789116 2.079819 1 1.944394 .860351 -1.911942 1 4.093262 -.726046 -1.325830 1 -.933536 2.693204 -.800212 1 -.888568 -1.260509 -1.428940 1 -3.577263 1.564869 .231487 1 -4.206451 -.984341 .800184 CI5 6 .021323 .118903 -.011177 6 -.035580 .012147 1.419455 6 .926451 -.235389 2.359764 6 -1.276062 .197828 2.170964 6 -.986109 .030498 3.474127 8 .361502 -.238330 3.618302 6 1.028201 -.205670 -.922002 6 2.278082 -.751388 -.744382 6 2.947512 -1.607067 .282640 6 3.122907 -1.442584 -1.658063 6 4.575517 -1.333195 -1.147920 8 4.360765 -1.477517 .229530 1 -.867682 .520071 -.449458 1 1.973095 -.381960 2.316495 1 -2.227729 .424736 1.747718 1 -1.561534 .059413 4.364920 1 .799540 .028401 -1.941998 1 2.536245 -2.410840 .851349 1 2.835010 -1.863849 -2.605084 1 5.283577 -.584742 -1.448772