{{Infobox model parameter| name = {{PAGENAME}}| param = <onlyinclude>''Δω''<sup>H</sup><noinclude/onlyinclude> Proton | desc = The proton chemical shift difference between sites A and B, in (2-site).| equation = {{:omegaHB}} - {{:omegaHA}}| units = rad.s<sup>-1</sup>.}}