Na yi imani kuna iya nufin "kwafin kwanan wata" ko "coordinate covalent bond." Wannan nau'in nau'in sinadari ne inda atom guda biyu ke raba electrons guda biyu, amma dukkan electrons da ke cikin bond sun fito ne daga daya daga cikin kwayoyin halitta. wani zarra wanda ke buƙatar electrons guda biyu don kammala valence harsashi. Atom ɗin da ke ba da electrons ana kiransa donor, kuma atom ɗin da ke karɓar electrons ana kiransa mai karɓa. Misali, a cikin mahadi ammonium ion (NH4), nitrogen atom yana ba da gudummawar biyu na electrons ga kowane ɗayan atom ɗin hydrogen guda huɗu, yana samar da haɗin gwiwa tsakanin su. tsari da kaddarorin mahadi masu yawa.