#P HF/6-31G(d) freq HF/6-31G(d) freq dimethyl ether (C2v) 0 1 X1 O2 1 1.0 C3 2 r3 1 a3 C4 2 r3 1 a3 3 180.0 H5 3 r5 2 a5 1 0.0 H6 4 r5 2 a5 1 0.0 H7 3 r7 2 a7 5 d7 H8 4 r7 2 a7 6 d7 H9 3 r7 2 a7 5 -d7 H10 4 r7 2 a7 6 -d7 r3=1.39120897 r5=1.08133084 r7=1.08890202 a3=123.0953314 a5=107.64647039 a7=111.49341022 d7=-119.34418236