Pyrazolo[1, 2-a]pyrazoliumolates as novel structure elements in liquid crystals [1]

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• All new compounds described in this communication have been fully characterized by IR, UV, 1HNMR, 13CNMR and high resolution mass spectrometry. For details see Supplementary Material which has been deposited in the British Library. (Copies of this material which comprises 9 pages may be obtained from the British Library, Lending Division, by quoting the number SUP 16524 according to the procedure described at the end of this issue.)
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• 3f: red crystals; mp 178°C (ethyl acetate-petrol ether); UV(CH3CN) λ (lg ε) 208 (4.58), 227 (4.51), 267 (4.75), 440 (3.07); 1HNMR(CDC13): δ.9 (t, 3 H, CH3), 1.25(m, 12 H, CH2), 2.3 (t, 2H, CH2), 2.50 (s, 6H, CH3), 5.15 (s, 1 H, OH), 6.8 (d, 2H), 7.9 (d, 2H).
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• 4: orange red needles; mp 158.5°C(ethyl acetate); UV(CH3CN) λ (Ige ε) 209 (4.53), 271 (4.64), 415 (2.78); 1HNMR(CDC13): δ 0.87 (6H, CH3), 1.2–1.8 (m, 16 H, CH2), 2.33 (t, 2H, CH2), 2.53 (s, 6H, CH3), 4.03 (t, 2H, OCH2), 6.95 (d, 2H), 7.15 (d, 2H), 8.13 (2d, 4H).
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