Coordination Isomers of Biological Iron TransportCompounds. VI. Models of the Enterobactin Coordination Site. A Crystal Field Effect in the Structure of Potassium Tris(catecholato)chromate(III) and -ferrate(III) Sesquihydrates, K3[M(02C6H4)3]-1.
PRINCE, WATKINS, FRONCZEK, GANDOUR, WHITE AND GOKEL
895included as fixed contributions with C--H 0.95 A and B = l'3Beq of the bonded C atom. The N--H hydrogen atoms were refined isotropically.The function minimized was Y w(lFol-IFcl) 2, and weights were assigned as w = 4FoZLp[S2(C+ RZB) + (0.02Fo2)2]-1, where S = scan rate, C = total integrated peak count, R = scan time/background counting time, B = total background count, Lp = Lorentz-polarization factor, using the Enraf-Nonius
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