Carbenes are known to insert into carbon-hydrogen bonds of various alkanes to form functionalized branched products, as supported by studies on alkane C-H activation.
The retrieved literature includes studies demonstrating carbene insertion and C-H bond activation across various small and medium alkanes (such as n-butane and n-hexane), supporting the feasibility of carbene insertion into alkane C-H bonds to yield branched or functionalized products. There are no papers refuting the claim.