Scheme 1 Proposed mechanism for formation of 2.
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¨
Fig. 4 ORTEP plot of 3 (50% displacement ellipsoids. Molecule has
crystallographically imposed twofold symmetry). Selected bond
lengths (A) and angles (1): Fe1–N1 2.002(2), Fe1–P1 2.1880(8),
Fe1–P2 2.2342(7), N1–N1a 1.412(4), N1a–Fe1–N1 41.30(11),
N1a–Fe1–P1 152.94(6), N1–Fe1–P1 111.88(6), P1–Fe1–P1a 95.10(4),
N1–Fe1–P2a 85.81(6), N1–Fe1–P2 95.46(6), C3–N1–N1a 114.2(2),
C3–N1–Fe1 127.61(16), N1a–N1–Fe1 69.35(5).
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8 Crystal data for 3. C24H42FeN2P4, M ¼ 538.35, monoclinic, a ¼
8.9761(13), b ¼ 16.911(3), c ¼ 17.931(3) A, b ¼ 99.899(7)1, V ¼
2681.4(8) A3, T ¼ 100(2) K, space group C2/c, Z ¼ 4, N ¼ 8539, Nind
1999 (Rint ¼ 0.0345), wR(F2) ¼ 0.0653.
** Azobenzene–15N2 was prepared by oxidation of aniline–15N with
MnO2.17
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1682 | Chem. Commun., 2008, 1680–1682