Rapid and Efficient Synthesis of Hydroxytriarylmethanes under Ultra Sonic Irradiation Using Keggin Heteropolyacids and Preyssler Catalysts in Green Conditions

Table 2

¹³C NMR data of the compounds (a–f).

Entry	Product	^13C NMR (ppm)
1	a	100.2, 117.4, 120.7, 123.9, 125.7, 126.1, 126.8, 131.5, 135.1, 136.6, 145.8, 148.2, 155.9, 158.1, 183.4
2	b	20.4, 21.6, 98.61, 99.5, 120.2, 120.4, 124.6, 126.0, 127.1, 127.4, 127.8, 129.6, 130.7, 133.8, 134.9, 137.4, 146.1, 152.0, 154.3, 155.2, 181.9
3	c	14.2, 17.5, 93.2, 100.2, 118.9, 120.6, 121.1, 124.7, 126.7, 127.5, 127.7, 127.9, 128.7, 129.9, 134.2, 136.1, 145.3, 147.1, 156.8, 157.3, 179.5
4	d	80.1, 96.3, 110.0, 115.9, 124.3, 124.6, 125.9, 126.9, 127.5, 127.6, 127.9, 131.0, 134.5, 137.7, 144.5, 150.0, 150.7, 161.1, 173.9
5	e	83.2, 98.8, 119.4, 122.2, 123.1, 124.8, 126.1, 126.9, 127.4, 127.5, 127.8, 130.5, 132.0, 134.1, 145.9, 150.0, 154.3, 155.6, 175.3
6	f	78.9, 115.9, 120.0, 123.9, 127.4, 127.6, 128.4, 129.0, 135.6, 141.1, 147.7, 148.2, 156.0, 170.1, 173.3