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Crystal Engineering on Organic Pigments

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N<br />

H 2<br />

N<br />

N<br />

Pigment Red 170<br />

O<br />

H<br />

O<br />

O<br />

H<br />

N<br />

O<br />

CH 2<br />

CH 2<br />

CH 3<br />

Why ethoxy group?<br />

Ethoxy:<br />

Good properties<br />

Methoxy:<br />

Solubility higher<br />

Properties worse<br />

Propoxy:<br />

Solubility higher<br />

Properties worse<br />

Reas<strong>on</strong>?

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