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Molecular structure of 1 b (thermal ellipsoids pictured at 50 % probability level; hydrogen atoms omitted for clarity). Selected interatomic distances [Å] and angles [°]: As1−N1 1.862(3), As1−O1 1.933(4), As1−O2 1.933(4), N1−C6 1.420(8), N1−C20 1.393(8), O1‐As1‐O2 164.39(12), N1‐As1‐O1 82.9(2), N1‐As1‐O2 81.8(2), C6‐N1‐C20 128.1(4), C6‐N1‐As1 115.2(4), C20‐N1‐As1 116.6(4).
