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29-MAR=75 07: 40:38, 767

Date: 29 MAR 1975 6740-PST

From: LEDERBERG

Subject: A4

To: CARHART

HI RAY =—~ IT WAS PONDERING THE SAME TEASER, AND GOT A NEARLY SIMILAR
ANSWER. ACCORDING TO MY TEXTS, THE CONVENT LONAL GRAPH FOR A-&

( KareveX )

IS A TETRAHEDRON, EACH NODE OF WHICH IS, SO TO SPEAK, CIRCULARLY POLARIZED, IN THE SAME DI

**RECTION, I HAVE TRIED TO SIMULATE THAT WITH A RING
{~ ~C-AR-C—AB—C~AB~] (A.B SERVING TO DIRECT THAT LINK OF THE GRAPH).

ONE THEN NEEDS TO PLANT ANOTHER CENTRAL ATOM IN THE MIDDLE OF EACH RING
TO GENERATE A FREE VALENCE, SO THIS PROBABLY ADDS UP TO A LARGER GRAPU
THAN YOU DREW,

I TRIED TO BUILN THIS STRUCTURE TO SEE IF IT CIULD BF DRAWN.

SEF <LEDERBERG>A4X,A4 AS IT WAS #SAVE°D IN ES.

"0 YOU HAVE A DRAWABLE VERSION OF YOURS?
OSH