“…agreement with the corresponding distances in the simple analogues of (I), such as (II), (III), (IV), (V) and (VI) [1.376 (1), 1.377, 1.385, 1.394 (3) and 1.379 (4) Å , respectively], and the lengths of the C4-O2 and O2-C11 bonds compare well with those found in (VII) and in the methoxy derivatives of naphthalene such as 2-methoxynaphthalene [C ar -O = 1.3749 (11) Å and O-C methyl = 1.4250 (14) Å ; CSD refcode SAYRIT (Bolte & Bauch, 1998)], 1,4-dimethoxynaphthalene [C ar -O = 1.37 (1) and 1.39 (1) Å , and O-C methyl = 1.46 (1) and 1.44 (1) Å ; CSD refcode ALUJIA (Wiedenfeld et al, 1999)] and 1,8-dimethoxynaphthalene [C ar -O = 1.359 (2) and 1.362 (2) Å , and O-C methyl = 1.425 (2) and 1.419 (2) Å ; CSD refcode KEPKUL (Cosmo et al, 1990)] and with the values given by Allen & Kirby (1984). The ten-membered aromatic ring formed by atoms C1-C10 is planar, with the largest out-of-plane deviation of À0.015 (2) Å for atom C9.…”